Brands of room treatment? just don't get anything made of foam!!!
I think GIK or Real Traps are the best option if you want to buy ready made ones. You can save money making them yourself though... it's not hard at all if you spend a little time reading up on it.
All the info you need is at
www.johnlsayers.com - just click on the 'Recording Studio Design Forum' at the top of the page.
Rez