call your local fire department about fire codes regarding plenum.
i'm with russ. sometimes name brand is better, but as long as it's UL, it's good.
mucman, how do you plan on doing this?
i am about to do the same to mine. but via the external way, that is, NOT inwall, which does not require plenum.
home depot is a good source for your cabling... i remember seeing 1000' for like $50 or so...