Panasonic is launching two 1080p panels later this month, 50 and 58 inch, model numbers have 700 in them. They have "limited release" versions 750s coming with fancier color calibration later this summer. AVS definitely has way more info than most people want on plasmas, their threads run into the hundreds of pages, but from what I've read (simplified grossly) the Pioneers often get the edge in color and overall picture quality, but the Panasonics are often listed as better bang for buck.
In-wall speakers are tough to audition, multiple people recommended the Triads when I was looking at on-wall and in-wall speakers. I did not manage to listen to them in my auditioning. I went with Gallo AVs on-walls which are a bit pricy but sounded really good to me (and I like the design). The axiom in-walls were reviewed very well here, and would be another one to consider, although being able to demo an internet direct speaker only works so well when they are in-walls (guess you could start smallest first
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You can poke around the sub threads for recommendations, Hsu and SVS are both very popular internet direct companies considered to be very good values.
Receivers recommendations will also cover lots of ground, but it seems like there are a lot of recommendations for Denon, Yamaha, and Pioneer here. Definitely check out the $10k and probably $5k and $15k ones too...
Good luck.
--Matt
