Re: Mp3 format woes.
128 is fairly low by modern standards, broadband Internet connections being what they are.
256 is overkill, though. It's nice to have high quality but over 192 it really is a matter of rapidly diminishing returns. In numerous studies and in my own subjective testing, I've found it very difficult to distinguish between true PCM (.aiff, .wav), lossless (FLAC) and Mp3 at 192. If anyone tells you they can tell the difference, be very skeptical. If presented with the choice at purchase, I tend to buy lossless (FLAC) and then render my own Mp3 files but it's not a huge deal to me either way. Modern compressed audio really is very good indeed.