If you are looking for new display, I would pick one of the last best plasma breeds before they are gone for good. S60/ST60//VT60/ZT60 are all this years new models. For plasmas Panasonic have been king for the last few years, Samsung finally made a very good top of the line plasma this year as well (F8500). As for new technologies are concerned, OLED is the next big thing, very pricey at this point but superior in picture quality. 4K LCD's are out now as well Sony,Samsung,Panasonic, soon others will come. Not as pricey as OLED but with 4K content they look spectacular, the only problem is that there is not much true 4K content out there and it's still a few years away until cable here in North America has it. It does upscale all your current content nicely though. Hope this helps a bit. As for Vizio, I would only look at the top of the line series, nothing else.
TV - Panasonic 55GT50Main Speakers - Klipsch Gallery G28'sCenter Channel- Klipsch RC-52Sub - Klipsch Sub 12Surrounds - Klipsch RS-52 II (new)Bluray/Game - HTPC/PS3Receiver - Onkyo RC-360HTPC - Intel Core i3, HDMI,Windows 7,XBMC,Bluray,3 TB,wireless WMC keyboardVideo processor - Darbee