Hello, I am a retired computer programmer starting in 1967 and to today. I build PC's and fix them for friends. Never owned an Apple so I purchased a 27" I3 3.2 ghzt I-Mac yesterday(2010). Does this thing have enough power to run smoothly? Can I use a regular PC usb keyboard and mouse? Is 4 gig enough to run? I have 8 gig on my everyday pc. Does anyone watching use Firefox/Thunderbird as browser/e-mail. If so how do they run on the I-Mac? What is the normal word processor most people use?