I've read a few negative posts about the Sony DAVS800. Is it a reasonable introduction into home cinema for ~£640? For ~£1700 I could choose: Denon 3802, Denon 3300 and a Mission FS2-AV. Can a novice really tell the difference when I'll be using it at relatively low volumes? What does that extra £1000 buy me? Cheers for any advice.