Look at a Sony STR-DA2400ES on ebay - there are often one or two on at reasonable prices and they are superb.
You can select the number of speaker outputs enabled, anything from two to six - you can use just about any general speakers for the surround outputs, if you wish, and have input options for just about anything you can think of.
Just make sure it has the remote controls with it! They come with two, a full size and a compact one.
Examples:
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Review:
Sony's STR-DA2400ES AV receiver was delayed while it was fixed to work with Sky+ HD, but the finished article was well worth the wait