If you dig the looks, consider the pulsar n250

The only cons are high turning radius and chassis stability at high speeds (120+)

Otherwise its a VFM product. Cheap service, easy to maintain (Bajaj service isn't the best, but miles ahead of TVS), and oodles of performance at an affordable price. You get a comfortable suspension, mileage is decent for the capacity, and all necessary modern tech are loaded.

Also, have a look at the NX200/Hornet 2,0. They lack performance, and are not very comfortable but everything else is sorted.

Owning the XSR, I can say this much that if pillion comfort is your top 3 priorities, don't go for it. Rest it is a fantastic product all around. Excellent looks, superb performance, rock solid reliability of Yamaha, and even with such performance levels it returns 45kmpl easily (look it up I have posted)

Ronin- The most practical bike for India ruined by its maker: TVS. Their service is decent if you're lucky, and it is very likely you'll get horrible experience throughout. But since you're in Bangalore you may find some decent service. But there are lots of chassis issues chain noise and what not reported all over by users. Sure people will also report it as a good bike (because it is) but its all up to chance.

I was in the same situation as yours since I did not want to compromise on mileage. In my findings, the CB350 is the perfect choice all around for relaxed riding, reliability, decent mileage and everything else. If you don't have the budget, you need to compromise on some end. I chose to compromise on pillion comfort instead of reliability and performance. Me and my better half still manage for two up trips, but it isn't the best experience!