cgarcrhitect is ok, some excellent stuff up there but alot of it aint so great.... and alot of the critiques are...clueless ...
before you can become good representing your project, you should understand how the most basic of things can make it the DOGGS BALLS.
I would definetly recommend Draper, 'Deconstructing the Elements with 3DS 6' , and hes got a website xenomorph.com or somethin with some great tutirials also, google the man.
Dedicate some serious time to 3DS... Its the most fun and rewarding program i come across
All this MASTERING AUTODESK XXX is crap TBH