Newbie here. Is it normal for iTunes on a brand new iMac (2.8/4gb/750gb) choke when importing a biggish (300gb) mp3 library? I've tried three times and iTunes freezes after importing only 50~60gb. Force quit didn't work and I've had to do a hard restart twice. The last time I tried spoon feeding it folder by folder but with the same result. Is this an iTunes thing? Hardware? Or something more obvious?