New MB here (first time mac user as well), i have no whine, no heat issues...BUT, on occasion my macbook won't shutdown in a timely manner. The first time this happened I shut it down manually by pressing down the power button. The second time i waited, maybe 2 minutes, tapped the power button, and maybe 5 seconds later it shut down. This only seems to happen when i have the computer on for a while. My other issue is with my external speakers. I have some altec 5.1 speakers that work perfectly with my PC....but the volume is probably half as loud when connected to my MB. Maybe the speakers are not mac compatible??? I'm more worried about the shutting down issue...any ideas??