UnLESSSSSS you want to save money. "Last year's model" is not a bad way to go to save $$$. The benefits is that you get something many people have used and have given opinions on. I have a MacBook with a 2 Gig processor because the owner--who only used it to surf church websites on Sundays--just HAD to have slightly faster processor. More seriously, it came from a dealer.
The downside is, of course, you do not get the NEW FASTEST which, I admit, is tempting. I wanted a replacement for a powerbook--yes, that is what I call them!--that served me well for eight years. That may not be what you want.
--J.D.