first off...The TT01 is a pretty damn hard chassis......almost unbreakable
second....What type of chassis do you want? Belt drive, or shaft drive. if its Belt drive, then ill go for the tb05, and no, the belts dont wear through that fast, if you keep an eye on the tention of the belt, youll be good to go for a while. and belt cars are a bit more responsive on the throttle
Shaft driven cars are great (i personally prefere shaft). You can be more constant around corners with them. here ill take the tb03 or the Yokomo drift pack.
in my opinion........the two Tamiya's your looking at is decent and good buys, but i tend to lean towards the tb03 as its shaft driven
Yokomo

TB03 with the conversion kit

TA05