It's the z85 vs the z800 that are my potential choices though.
The only things I can see different between the z85 and the z800 are difference in speakers (irrelevant for me), the 800 has slightly more Shades of Gradation, 48hz mode, an extra HDMI input, and thx mode.
Now the only thing on that list that could be relevant for me is the THX mode.
The question is, would it make a difference over a properly optimized z85.
I just can't see it being worth that much extra money for slightly more shades of gradation, one more hmdi input, a useless 24p cinema mode, and a THX mode, that you can get similar or better results than by optimizing.
http://www2.panasonic.com/webapp/wcs/stores/servlet/vModelComparisonResults?storeId=15001&catalogId=13401&catGroupId=75003&surfCategory=VIERA%26%23174%3B%20Plasma%20HDTVs&cacheProgram=11002&cachePartner=7000000000000005702&items=227174|221678|