If you want to stay within the Royal Enfield fold, you can look at the Hunter 350, which will feel much more manageable and comfortable than your older Bullet. But if you want to get a new version of your bike, the base Battalion Black and Military variants of the Bullet 350 will fit in your budget.

The latest Bullet is a refined, comfortable and reliable machine which should return decent fuel economy, when ridden sensibly. Do bear in mind that with the Hunter, you will get dual-channel ABS. But the Bullet's base models only come with single-channel ABS and a rear drum brake. 

Alternatively, other options from reputed brands worth considering are the TVS Ronin, Apache RTR 200 4V, Honda CB300F, and Bajaj Pulsar N250. These smaller bikes will offer similar performance to the RE 350s - if not more - while being more fuel efficient too. 

Take a test ride of these machines before you make a decision. 

Since you are a taller person, we would recommend you look at the Yamaha XSR155 instead of the MT-15 as the XSR is a more spacious machine which will be useful to you. For a similar price, you will also get larger machines like the Bajaj Pulsar N250, TVS Apache RTR 200 4V and Honda CB300F. It will offer you better performance at the expense of a small hit as far as fuel efficiency is concerned. 

Since you have mentioned that you are considering the Honda CB350 models. Do bear in mind that these are relaxed neo-retro roadsters which will offer you a more laidback riding experience and good comfort levels. Although fuel economy will be quite a bit lower than that of the smaller bikes we have mentioned above. It is also worth taking a look at the Royal Enfield Hunter 350 because it offers a similar experience to the CB350 but at a lower price and has comparable fuel economy and performance, too. 

A test ride of every bike you shortlist will help you make a decision. 

Since you have a long commute and you want a sporty-looking bike, the options you should be looking at are the TVS Apache RTR 200 4V, Bajaj Pulsar N250 and Honda CB300F. These are machines that will return respectable fuel economy, have enough performance and comfort to tackle your long daily commutes and also be reliable in the long run. 

However, since you have mentioned that your route has a lot of bad sections, we would strongly recommend you take a look at the Hero Xpulse 210. With its upright ergonomics, long-travel suspension and smooth, tractable engine, this will be the most accomplished bike to handle your daily runs. 

Take a test ride of these bikes to see which one suits you best.

Considering your requirements, the options we would recommend you take a look at are the Bajaj Pulsar N250, TVS Apache RTR 200 4V, TVS Ronin, Honda CB350 and Royal Enfield Hunter 350. Of these, the lighter 200s and 250s will feel more agile and have better fuel economy, while the heavier 350s won't feel as agile but will be a little more comfortable. 

Another option worth taking a look at is the Hero Xpulse 210, which will be the most comfortable of all the bikes listed here. However, it won't be as agile owing to its large 21-inch front wheel, soft long-travel suspension and long wheelbase. 

There are also some instances of engine issues being reported online, so it would be advisable to wait for some time before purchasing the Xpulse.

A test ride of these bikes should help you figure out which is the best option for you. 

Depending on what sort of bike you want, there are many different options to choose from. If you want a sporty commuter, then bikes like the TVS Apache RTR 160 / 200 4V, Bajaj Pulsar N160 / N250, Honda CB300F and the Suzuki Gixxer models will be good options to consider. 

If you want a neo-retro bike, then bikes like the Royal Enfield Hunter / Bullet 350, Yamaha XSR155 and TVS Ronin will be the ones we recommend. 

If you want an ADV, then the Hero Xpulse 200 / 210 will be bikes that deserve your attention. 

Take a test ride of everything you shortlist before making a decision. 

The Bajaj Pulsar N250 you have shortlisted is a great option because of its smooth engine, plush suspension and great fuel economy. 

Other bikes you can consider are the TVS Ronin and Honda CB300F. The latter is similar to the Pulsar in its style and riding experience, but the former is slightly more cruiser-y in its styling. 

A test ride of all three should help you figure out which bike suits you best. 

Since this is your first bike, starting small and approachable would be the smart way to go about it. In that same vein, we would recommend the new Yamaha XSR155 because it is a light, comfortable, fuel-efficient machine that's also reasonably exciting to use. 

If you want a larger machine, then bikes like the Honda CB300F, Bajaj Pulsar N250 and Suzuki Gixxer 250 would be good options. 

Take a test ride of everything you shortlist before you decide. 

Since you have a commute that has some highway riding, we'll recommend bikes displacing 250cc or more so you can maintain decent highway speeds without feeling the engine is strained. 

There are loads of options in your price bracket, like the Royal Enfield Hunter 350, TVS Ronin, Honda CB300F, Bajaj Pulsar N250, Hero Xpulse 210 and TVS Apache RTX 300. 

Take a test ride of all the machines you shortlist before going ahead with your purchase.