I've been with Fantom Racing for 16 years and they have the best customer service of all the major players in the rc game.
I totally back up with what Jeff has said about the motors and the advice he has given you.
Currently the new V3R is the king of outright speed and performance in 2wd buggy or the V3T is the best for 4wd and ST.
My V2T is incredibly quick and was the quickest at last years Australian Nationals where it TQed in 2wd and 4wd.
Not a good idea to bag out companies on here as most are watching these posts and you may not get the support if you bag out everyone of them.