Sorry to hijack the thread
But I am also in the same confusion to get either Sony or Samsung.
Last year November I got a Samsung 40 inches EH5000 and its working well and has good picture quality.
Recently I was thinking to get a TV as for myself for gaming as well so was looking at Sony W700 series in the 40 to 47 inches range but was mighty confused to got with Sony or Samsung considering the Sony models have the least Input lag hmm.
Sony W670 is also a good model.
At my friends place recently i saw a Panasonic IPS model and I was truly impressed by the picture quality of the IPS panel.
No idea about the LG models at all. May be someone who has LG TVs can comment.
@OP can you please share what models of Sony and Samsung you have shortlisted ?
Then we can definitely help you better.