I bought a Honda Unicorn two years ago as a beginner and now want a slightly more powerful, reliable bike within a ₹2.5 lakh budget (can stretch a bit). I ride 20–25 km daily and need good mileage, comfortable pillion space, occasional touring (rare off-roading), and low maintenance/spare costs. The Xpulse 210 interests me but its 140 kg max load is a concern. The bike should handle Bangalore road conditions. Please suggest some bikes to explore.

The TVS Apache RTX 300 and KTM 250 Adventure will both fit the bill for your needs. Both have spacious seats, will return decent fuel economy, have great suspension and ride comfort and should be light on the pocket. Do bear in mind that these bikes are significantly more powerful than the Unicorn you currently have, and if you want something that's more laidback, there are other options. 

Bikes like the Royal Enfield Bullet / Classic 350 and the three Honda CB350 models will also fit the bill if you don't mind their laidback character and retro looks. 

We recommend a thorough test ride before you choose.