Having checked out a number of makes and models, the only 2 I would ever touch are Sony and Samsung. The others are just dull in comparison, and the colours washed out. The local Tesco has a wall of LCDs, and if you assume that they just set them up 'out of the box', the Sony's and Samsung's are the ones that draw your eye - pictures are brighter and colours stronger and more vivid.
Looking around the net, I've found loads of advice as to how you can tweak and improve the image by accessing maintenance menus and so on, but if you're spending a fortune on a new TV, you shouldn't need to do that. You just want to plug it in and watch a beautiful HD picture. And that's just what you get with the Sony and Samsung units.
As for motion blur - there's certainly none on my D3000, even with the fastest games - so it's also ideal for movies. Sound is also great, though it could do with a little more bass. Check out
this review.
Still, a lot of it is down to the individual's eye and how you like your TV image. I often wonder how some of my friends & family watch their TV, since - for my tastes - they either have the colour too strong or the brightness too high.
The only brand I would always advise against is Philips, since every time I've seen one of their TVs in action, it's been like looking through a dirty window!