The TC4 is a Nice Shaft Drive and Comes with a 17T motor but as far as I can tell costs the Most..

I Own a Sprint 2 and if your careful there isnt an issue with chewing Belts.. you just have to use caution when Drifting in car parks with loose surfaces..

Only ever seen a Losi, never actually driven one..

Since Your list is now Down to 3 cars (all of them are great choices,Glad you didnt go Yokomo)

The Next Question I would be Looking at is : Can I get the parts I need for my chosen chassis locally.

2. If I go top of the line, will I be able to run it on Good Batts and get a Decent charger.