Choosing a telly is a very personal thing, I think, and really depends on many factors and on what you want. Are you after the best value for your money, or a larger number of available settings, or the brightest colours, or the smoothest moving pictures...etc... The list is never-ending. It's really not easy to suggest something, because what I might like might not be to your taste... I'm personally not too keen on backlit-led TVs, and I tend to really like Sony TV sets because I like their interface and I find that they offer many settings and parameters, but some people don't like that Cross-Bar interface at all. LG TVs are usually excellent value for money - they can be cheaper than the competition, with bright pictures (sometimes too flashy for me, but again, it's a question of taste...) and a user friendly interface. But I disliked the two LG sets I tried because of the very limited number of settings and options (might not apply to all their models, I don't know). The post above mentioned Samsung - why not? - but in terms of picture quality you'd be hard pressed to be able to tell for sure that they offer something significantly superior to Sony, Toshiba or Panasonic TV sets, for example... You can be shown as many statistics and lab test results as you like, but ultimately it's your eyes that can only tell the difference. And a lot of people can't!!
One thing to take into account for sure, though, is the warranty. If you can get a free 5-year warranty deal, I'd say that should help you decide between two sets too. Modern TVs are not as reliable as the old ones used to be, unfortunately. Most repairs are costly, and are often not even worth considering if you think of the price of a brand new set.
Don't believe what the people at Currys and Comet will tell you. I think they are only working on their commissions. The only thing I could say for sure is, stay away from those obscure, ultra-cheap brands that you can find mainly in supermarkets.
Good luck!