TV is a Sony 50A3000 SXRD 50" - This is an incredible gaming TV, you can either play with zero lag in "game mode", or kick on the motion enhancer and magically turn your 30fps games into 120fps, with less lag than most TVs even still. Not to mention the colors are *perfect* out of the box.
Receiver is a 5.1 Panasonic, hooked up to Athena AS-B2s all around (great speakers), with an Athena 8-inch sub that is more sub than my apartment (and neighbors) can handle.
Connected to it is a Wii (component), 360 (HDMI), Dreamcast (VGA), Super Nintendo (S-video) and HTPC (HDMI).
The HTPC is my pride and joy - gaming wise, its running Vista Home with GameEx as a front end for emulation of every system that isnt already hooked up, all set up to scale/interpolate the graphics to 1080p (using hqx filters for 2d and 1080p rendering for n64/PSX). Everything is controlled with a wireless logitech rumblepad that has all the right buttons in the right places, with keyboard emulation to make sure the L2/R2 buttons control savestates = effortless quicksave/load in pain the ass hard old school games FTW. I declare that there is no finer retro gaming setup in the known world.