My suggestion would be to go to one of the large electrical stores Currys, Comet etc. Ask the questions which you have posed post regarding connectivity. (DO NOT BUY AT THIS POINT)Once you've got a list of "surround sound setup" do a search in this forum to get an idea as to suitability.Ask questions if necessary on specific models you're interested in.Finally price check.
The problem with asking your initial question here is there are a few models which may suit your needs. A little research at Comet etc, could help in narrowing your choices.
Hope this helps
Del
ps I'm not advocating buying from these stores as the prices can be somewhat uncompetitive. Furthermore check that the models are current.