Has anyone used the IB TWS for a MAC? I just got off the phone with the apple store and b/f I drop $11k on 2 powermac's and 8 (overpriced) monitors, it would be great to hear from someone who might be willing to share good/bad experiences running TWS on a MAC. Def? IBsoft? It would be great if you guys have any input if there are any known differences b/t the tws downloads for windows or mac. Many thanks in advance.