So, I've had this tv for approximately 1 month now and so far I am really impressed! I don't use the tuner as I am a virgin media customer so can't comment on the picture when using it. When watching it through the TiVo box the picture is good for the sd pictures and fantastic when watching the hd channels!
I also do some pc gaming using it and again the picture quality really is amazing with no noticeable input lag. It has taken some fiddling with the settings to get the best out of it but there are plenty of pre-sets, some of which can be altered and are stored so it's easy to swap between your favourites. There is a small amount of bleeding at the corners of the screen, particularly where the power light is but I barely notice it when watching movies. I also like to change the screen ratio to remove any black bars at the top and bottom of the picture which removes the issue completely.
The sound settings also needed altering but in my opinion it is perfectly acceptable for a mid-terrace living room.
The usb media players is also useful and very good. It plays all the mp4 and avi files I have tried, removing the need to use the pc for watching them.
All in all, I'm very pleased with this tv and wold certainly recommend it to anyone who is considering it. For anyone not with virgin etc it may be worth checking the picture quality on the next model up which has a freeview hd tuner for £50 extra as if the improvement in quality from sd to hd is the same as it is wth TiVo then it is definitely worth it!