I'm VERY happy with my purchase. I feel lucky that I was able to get a 65" HDTV for around $700 delivered that also supports 3D (when I'm ready for it). While it's not a pixel perfect display, it's no computer monitor, it displays good quality sources equal in video quality to top end LCD/LED and plasma HDTVs.
But my nvidia based chipset HTPC might make my C10 look better by using the hardware PureVideo decoder. I tried watching The Event that I had previously recorded using XBMC and when I selected "software" decoding the picture was really dark. But when I enabled hardware decoding the video popped showing all the details. I no longer have a standalone HDTV Sat. or Cable tuner to compare to so I can't comment on the differences between those devices.
Sadly, with these lower end sets it's key that you spend the time calibrating the HDTV. Right now I'm using the Brilliant mode for almost everything but with a color setting of 36 and a contrast of 95 (rest of the settings I posted before are the same). On some blu-ray movies the Bright mode looks better. Just be sure not to label the HDTV or Blu-Ray/DVD input connections as "PC Input" since it uses a different color gamut so things won't look right.