I am not the best person to advise on a all-in-one system, hate them.
They can not be upgraded.
One bit goes wrong it means throw it ALL away.
In flexible.
Useless connectivity, need I say more.
If I had your money to spend I would be looking at something like this
http://www.pixmania.co.uk/uk/uk/5420...ema-syste.html with a upscaling DVD player
http://www.pixmania.co.uk/uk/uk/5447...vd-player.html any part is replacable/upgradable has good connectivity. Connect DVD player with Digital co-ax and the XBOX and Virgin with optical cables.
http://www.yamaha-uk.com/pdf/product...ns/RX-V361.pdf you can even connect a Blu-Ray player which has Dolby HD to the 5.1 direct inputs, trying doing that on a all-in-one. Just add a set of stands from Argos for the speakers.