I think whatever is stocked at your LHS is very important if you want to save time/money and not having to wait a fortnight for parts and paying for exchange rate.
so..
1.see what is stocked at your LHS - even though they stock it, do they stock the spares for it?
2.see what's commonly used at the track - you can get tips/advice
my LHS stocks the Yokomo Bmax4 and their parts are relatively cheap! I can't get enough of it. Running 6.5t, jumps easily, broken 2 rear ball studs due to my excess speed and poor driving.
Hope that helps!
