Not sure whether this is the right place to post this, but here goes. I have a shiny new Panasonic plasma and Denon 2910 DVD but need some advice regarding audio. At the minute I am feeding everything through a Pioneer NS-DV99 (all in one) system which provides great audio but seems partially redundant now due to the Denon. Would I see a noticeable, real-world difference from seperates? I am considering everything from £150 Yamaha amps (Richer Sounds) through to £350 Pioneers. I don't really want to spend more than £500-600 on the amp and speakers and have looked at a Denon solution at Superfi which meets this budget. I guess my big question is - at this price point is it worth it or should I stick to sound through the Pioneer? Thanks in advance for any responses.