I am so excited - today I actually had my first conversation with my dad about buying a Mac that he didn't say "You're never getting one!" instead he said, "oh, thats interesting..." (non sarcastically.) Anyway, if I get a Mac I'm getting the Logitech Z-5500 speakers... 5.1 Digital. I was thinking about getting an iMac or a 12" PowerBook, but I want to take full advantage of these speakers. If I get a Mac, which one has the best sound card? Also, do they sell external sound cards for the Mac which provide Digital 5.1 Surround sound?