Mine is a rather modest setup.

Hitachi 32PD5200 plasma TV (doesn't carry the HD ready logo but supports 720p and HDCP via the DVI-D connector). I plan on keeping this TV for a while as the picture quality is fantastic and our lounge can't really take a larger TV.

Panasonic SA-HT520 (combi DVD player and 5:1 surround setup). It's again very modest but produces decent sound.

Sony PS3 for Blu ray playback. It's also connected to the home network for media streaming (belongs to my daughter, but is more or less always connected to main TV these days).

Custom built Media Center PC. Based on a Intel Core 2 duo with 2 GIG of ram, running Windows Vista. A more powerful (low profile) graphics card is needed for BD playback. Once i can get hold of one i'll probably fit a Pioneer BDC-S02 combi drive.