So I have beeen using the basement for about a week now, got one couch for now, I'll probably go with two rocker/recliners for each side of the media room. The couch is a reclining sofa, not quite HT seating but a decent compromise. Still need to hang the center channel, been putting that off for some reason.
I stuck a computer desk in the corner, I always liked to have the PC in the living room vs. a home office. I was hoping to have a liquor cabinet in the other corner, and hope to put an aquarium down here sometime as well.
As far as the gear goes, the plasma looks good to great on HD, not so good on SD. The Harmony 890 is awesome, does everything I want it to.