Which 1GB to 4GB players to people recommend for under £150? Possible candidates I've looked at are the Creative Muvo 2 4GB and the Rio Nitrus 1.5GB. Does anyone have any experience with these two? Preferably I'd like one that is both MP3 and WMA compatible as the two above are, but they don't have line out sockets for connecting to an amp. Do any players in this range have this capability?