Like I have said in some other posts about carpet.
Just stay away from the MASS backed carpet. This stuff looks just like the regular carpets but has a heavy rubber coating on the underside on top of the jute padding to cut down on heat and noise.
I have installed many carpets and this crap by far is the worst very hard to form and I don't think worth the extra $80 bucks.
http://www.stockinteriors.com/massback.asp
Doesn't really matter who you get it from it will be an ACC carpet. I have bought from resto shops and I have also bought carpet off ebay...It depends who is the cheapest that day LOL
AL