Ah yes, the short-man syndrome of the Mac! Unless someone starts making a Textmate argument, I doubt this debate is going to yield much more than the usual dribble about Macs being so much easier to use. If a PC is that hard for you to work off of, then design probably isn't your calling.

I run three 21" monitors off of my PC, have never had issue making a design "look good" on a PC, and listen to idiots that don't know crap about their computer tell me that Photoshop works better on a Mac.

Being a designer, I get the Mac / PC question almost every day. Not until the Mac starts cooking me dinner will I find a better reason to give up running all of the same applications on a much more powerful PC.