Personally I'd avoid any 1 box solution. They never really have the sound quality of a good 5.1 speaker setup with seperate DVD and processor etc...
Also it makes upgrading stuff harder... with separates you can upgrade things bit by bit, e.g DVD player to Blu-ray etc....
How much space have you got too?? Generally bigger speakers offer better sound, i.e. floor standers...
Something like -
http://www.lambda-tek.com/components...&prodID=B57319
Then with a yamaha process with what money you got left.
And as a generally rule you should spend 10-15% of your budget on cabling.