OK, im new to this, so all help much appreciated. At present I have a Philips 28PW9616 TV to which I am 95% certain of adding the Denon DHT500SD Couple of questions. 1. Whats the difference/benefit of going the 550SD? 2. Aside from connecting a Sky+ box, I have burned hundreds of CD's to MP3 which are on my PC which is in the office upstairs. Ideally I would like to access the MP3's directly from the PC to play through the Denon. Is this possible, and how would it connect. 3. Im also in the market for an MP3 player. Is it possible to connect this to the Denon. All help Vmuch appreciated.