What makes the 4300 so much better than the 4200? I'm definitely not going to have a 6 speaker system (excluding sub.w) so I don't need 6.1 - what else is better that I'm likely to want? I know it has Dolby Digital EX and NEO6 and a load of other stuff I hardly know anything about but what's it all for? Are there DVDs out there that will use all these new standards? I'm very tempted to just get a 4200 at a knock down price now that the 4300 is out. Michael.