Possibly a Mac Fan boy but I switched to a MacBook Pro, 2.66 iCore 7 with 4 GB RAM and never looked back. I use PS CS5 daily with Aperture on this device with barely a noticeable lag c/w with my MacPro - for which I use the 27 LED screen for final touch ups prior to enlarging. I also use iPhoto as my family JPG backup viewer for the devoted wife - she makes Christmas cards and the occasional book, but hush, hush don't tell anyone
C/w with my 'old' office PC, circa 2009 well there is no comparison - the Mac clearly starts up faster, processes faster and never crashes, so put one vote down for the MacBook Pro.
With the newer generation now offering the SSDs for your iOS and startup drive- it is a no brainer.