KTM 160 Duke

Since you're shopping in the 150/160cc segment and want flashy looks, good features and decent mileage too, here are all the options you should consider. The TVS Apache RTR 160 4V is a smooth, comfortable yet decently sporty machine. Also, since you mentioned that you want a more manageable machine, we'll stick with options that have a low seat and are lightweight. In a similar vein, you can also consider the Bajaj Pulsar N160 and Honda SP160, too. 

If you can extend your budget, bikes like the KTM 160 Duke and Yamaha MT-15 will also fit the bill because they have punchy performance, yet return good fuel efficiency and are lightweight and manageable too. 

If you're not going to go on longer journeys often and want to stay in the same displacement range as your Unicorn, the Bajaj Pulsar N160 and TVS Apache RTR 160 4V will serve you well. If you want a small step up in terms of performance without sacrificing too much fuel economy, the Bajaj Pulsar N250, Honda Hornet 2.0 and Suzuki Gixxer 250 will fit the bill. You can also take a look at the KTM 160 Duke and Yamaha MT-15 because, while they have smaller displacement engines, they are liquid-cooled and offer punchy performance with great fuel economy. 

The more laidback Royal Enfield Meteor 350 and Honda CB350RS will definitely feel more special in their riding experience and fit & finish. Also, it will be significantly more expensive to buy and maintain compared to the aforementioned bikes. 

Since you have mentioned you want a bike that looks sporty but is comfortable to ride, something in the 150-160cc sporty commuter space like the Bajaj Pulsar N160, TVS Apache RTR 160 4V, Honda SP160, or Hero Xtreme 160R 4V will serve you well. If you want something that is packed with more performance but is still usable and comfortable inside the city, the KTM 160 Duke and Yamaha MT-15 are options you should consider. 

We would also recommend the Royal Enfield Hunter 350 because it is a comfortable, approachable and reliable machine, although it doesn't have the sporty look you want. 

There are two types of bikes you can consider - sporty, liquid-cooled 160cc streetfighters and air-cooled, sporty-looking 160cc commuter bikes. In the former category, your options are the KTM 160 Duke and Yamaha MT-15, while in the latter, bikes like the Bajaj Pulsar N160 and TVS Apache RTR 160 4V can be considered. 

If you don't mind lower fuel efficiency, then the Bajaj Pulsar NS200 can also be a fun option within your budget. Another option that can be considered is the Royal Enfield Hunter 350, which will have a very different engine feel from any other option listed above, but will be comfortable and decently fuel-efficient. Something you can also consider if you're open to an ADV is the Hero Xpulse 210, which ticks all the boxes you want.