I'm looking to make my first purchase and can't decide between the DVPNS300D, or the DVPNS400D for an extra £41 (from EmpireDirect). The only difference I can see is that the 400 has a built-in Dolby 5.1 decoder, whereas the 300 doesn't. Is this the only real difference and if it is, is it worth the extra? Should I be considering any other makes? What d'ya reckon?