u can buy any 4wd touring kit that'll be at home with brushless and lipo power. hpi makes a gt3 rsr type body that will fit most all of the cars. also sell some more realistic rims to make ur ride what ur looking for.
i still have 1 in fact. perhaps i can slap it on my xray real quick and take a pic to give u an idea.
depends on who u ask. xray stuff is a lotta coin. and really should be at home on a racetrack. if ur not into racing or only a casual visitor to a track. then its prolly not for you.
the E is a fine car to play around with. looks very scale. would be a real inexpensive way to do things. i wouldnt go beyond 17.5 brushless. the thing with me and the tt01 and brushless, is that i dont think even the E has enuff gearing options to utilize brushless. it would be undergeared quite a bit and that does ur motor no favors.
a better plite would be to go score a tc4 or a ta05. and if no 911/934/996 etc body is avail (i know tamiya has 1 or 2 or 3, hpi does etc)....then find that kit u want and buy the body. paintin it how u want.
problem with tamiya is that their body sets are $$$$$$$$$$$$$$$$$ compared to every1 else.
honestly i did some lookin, and the tt01e is not really a good brushless platform. low on space, but more importantly short on gear options. and if u bought a hot enuff motor that required the shorter ratio it has, most of those will systematically destroy the drivetrain in short order. really look at a tc4, cyclone S, or close to and slap the HPI on top. u'll be very happy and can race if u like.