hey Michael!
We have a pretty similar setup...I can recommend the PB10NSD from SVS, I have had a lot of luck with it. We put a cloth and a lamp on it to raise the WAF..

info on the PB10-NSD:
http://www.svsound.com/products-sub-box-10nsd.cfm

congrats!

//
mike romo
2 M60v2s,VT100v2,2 M2v2s,SVS NSD-PB10, Denon2808CI, Sony BDP-S350, Samsung HP-S4253