I'm also a mac boxer. I'm still holding onto a cheap setup. 1 MacBook (2.16 Ghz Core 2 Duo, 2GB ram) and running Cloned Keys. I run 5 instances on the one machine. There are a few hardware lags here and there. Sometimes I lose a follower when traveling. Stormwind is impossible for me at the moment. I am going to soon try to use an older G4 iBook I have laying around to run 2 of the 5 via a wireless keyboard. We will see if that works.

I keep my windows set up the same way as you do Vix. Also, with all of the video settings turned way done I find that the smoothest play is when I can full screen the main toon. This is not always possible if I need to pick up items on the slaves but It cuts the lag for me.

yay Mac focused thread.