What should you take into consideration when buying a blu-ray player?

So i've just bought a 50inch HD LG TV, and I now want to buy a blu ray player.
I know nothing about them, so can anybody recommend any to me? Or tell me what I should take into consideration before buying one. I don't want to pay anything above £150.
Thanks
Update: I'm not fussed about being able to go onto the internet on it, or anything.

I just want it for playing bluray dvds, at a good quality. Thats all =]
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