I'd like to recommend Harrow Audio of Springfield Road Harrow, just a couple of doors away from Calamity Comics ! After a disappointing time viewing tvs at the Sony Centre , I went to Harrow Audio and purchased a plasma and my first cinema system from them. They kindly set this up for me at my house at no extra cost (being local to them) and I am very pleased. They appear to specialise in Philips but are able to get in Panasonics etc. Their website often shows a lot of old items when they infact stock many of the newest products.
Being a bricks and mortar shop, their shop prices can be more expensive than purely internet based sellers. Very knowledgeable and helpful, just ask for Richard or one of his colleagues.