Go for the VRX - Heres a link to one,
http://demonpowerproducts.co.uk/prod...oducts_id=3639
Comes with the hop-ups needed like, track rods for the steering instead of the 'bent wires', and bearings instead of bushes, countersunk chassis, etc. the spec is on the link.
I have the VRX and my friend has the caterham, which is the basic kit just a little different, and I am glad I choose the VRX over the hot rod / Caterham, as the spec is so much better.