You aren't going to get a definite answer over which sounds best, because they're both HQ lossly codecs and each will have their devotees and their haters.
Just pick the one which best suits your needs. Looking at what you've written so far, I'd choose 320K MP3.
Main gear: Mac Mini > HRT Streamer II+ > Marantz PM66 KI > Mission 794
Also cluttering-up the place:
Thorens TD160 no cartridge; Marantz CD63 mkII KI; Technics SL-P777; Cyrus 2 + PSX; Cyrus Tuner; Nakamichi DR-1
© 2013 Haymarket Publishing