itx-based PC with blu-ray player running Win7 Media Center (or MediaPortal or MythTV or XBMC or Boxee):
http://www.mediasmartserver.net/2009/09/07/building-a-mini-itx-htpc/
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Wireless-N USB adapter of your choice
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HD TV Tuner Media Center Combo (http://www.hauppauge.com/site/products/prods_hvr_internal.html)
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http://www.simerec.com/PCS-2.html (Turns the PC On/off using whatever IR remote you'd like)
And you have a PC that you can turn on/off and control from your couch, play internet streams (Hulu, NetFlix, ESPN3, ALMS, etc), local streams, HD OTA TV, cable/sat, etc.
Just add a Media Center remote (many HD Media Center tuner cards also provide an IR remote solution and a way to control the cable/satellite box)
Otherwise, I'd go XBox360 with XBMC as Sony's hardware is limited by their crappy software, which they don't want anyone playing with. XBMC improves the XBox experience, but doesn't solve the Blu-ray issue without an external Blu-ray player of some sort.