Q. I like 600i mainly for it's thunderous sound. But can anyone suggest a bike which is 1) more affordable and 2)sportier than the TNT 600i?

GO FOR Kawasaki ninja and z variants there are twin cylinder models but will be more sportier and good looking, also TNT 600I is four cylinder only bike, which is cheaper in this segment, no other bike with four cylinder comes this cheap.

This is the least expensive bike with 4 inline cylinders if you can affordable then go with ninja z900 which cost 9.15 on road

This is the least expensive in line 4 in the country so there’s no inline 4 bike that comes close to the Benelli’s price. But if you want something sportier try the ninja 650