I have both an Evader BX Pro and a Tamiya Sand Viper.
I used to race the Evader BX Pro that I handed down to my son when I got a FT B4.
The Sand Viper used to be raced by son until he got the Evader BX Pro.
Don't bother with the Sand Viper. I didn't like it at all. The primary purpose I got it was for my son to learn to build his own kit.
As far as I know the Evader BX Pro fares better than the regular Evader BX in terms of durability. However, a few things still need to be done to the Evader BX Pro to make them more bullet proof.
You need to replace the motor plate as the stock ones bend too easily.
You need to put hinge pin brace on the rear (I fabricated my own from aluminum sheet) to avoid breaking the rear arm mounts.
The tranny needs "hop-ups" too. Duratrax aluminum idler gear, B2 diff gear, B2 diff rings, 2 5x8mm bearings.
A lot of work, he he, but after the mods above, the car had been holding up well to my son's driving abuse and he runs an SS5800 on it.
I'd have to go with the recommendations of the guys here. Go with at least a Team Kit B4 on eBay.
Team Associated B4 * T4 * B44
Novak BL * Futaba TX/RX/Servos * Hyperion/Megapower Chargers
Orion/Yuntong/Maxamps Lipo * AMB #6655738