I've seen that stuff, expensive that gear! I've got a hobbywing brushless set up in my caster with a voltz 5300nimh and it lasts a good 20mins and its fairly quick
Had another look at that buggy, just been pricing the bits up I will also need, are them etronix brushless combos any good coz they are quite cheap? What turn motor you reckon?
I've looked at them, is that for the kit? I suppose I could get 1 and build it over a few months to spread the cost of the stuff I will need like motor and speed controller and just be getting on with my caster for now, I'll have another look at them now I'm on my dinner