TC3/TC4 are Great.. Seen some Wicked Moves from them..
They are more Agile then a TT-01 but not as Bullet proof.

I Don't like the Yokomo (Yes I have Drifted one and it felt too light)
Mainly I am against Yokomo for there Price and Parts are not freely available here in Australia where as HPI,Tamiya,Team Associated,LOSI and Shumacer(Spelling) are..

Best way to check what chassis is right for you is to check your LHS for there parts range and what they stock..
No use getting a Chassis to find out you cant get parts for 3 weeks...