I've been searching through old posts and am looking at getting a silver HK DVD player, I'm unsure which model to get as I can't make head nor tail of model numbers. Firstly I take it the 506 is out as I've read a few negative reports on it. This leaves a 25 and 2550, whats the difference between these is it colour or something? Thers also the21 and 22 are these new models of the 25 and 2550? I have checked the official HK website and this only mentions the 506, 30, 25 and 21. Can someone please shed me some light as I think I am almost ready to order my full system.