I was just wondering if a PB 1.5Ghz could run Logic Express. I know my friend who makes music says he need all the power he can get, and is going to buy a dual G5, with more than 4 gigs ram and hook it up do his dual g4. I'm only worried that if i buy the pb 1.5ghz that it won't be fast enough. Should i go for the 1.67Ghz with the 128mb graphics card? I just don't want to be dissapointed with what i buy!