I was fine with 192kbps... 256kbps is okay too, but um, bigger.
Anything above that seems like overkill for our purposes, and wastes PSW bandwidth.
Downloading one 10MB mp3 is no big deal, but we have had 30 entries before... if my math is correct, that's 9GB of bandwidth if everyone uploads to the PSW server, and downloads every entry...
FLAC would be huge... 5 times the size of 192kbps mp3.