I have had this workhorse for a year, and it handles everything. I can have eight or 10 programs opened concurrently and never have anything run sluggishly.the operating system is incredibly stable and the only two software/OS complaints I have are that in the process of integrating Apple Mail, iCal, and Address Book, they significantly weakened the way calendar events are handled.since I was a power user who pushed it to the extreme, I am no longer able to use the calendar application the way I used to. I have also had some minimal problems with the Safari 4 upgrade, but I am quite content with...