I too have always wanted a TUMI, and am thinking of getting one as a graduation present for myself. Not too crazy about the Gen4 and derivative products, but love this:
http://cgi.ebay.com/NEW-TUMI-2967-at...QQcmdZViewItem
The 2967 looks fantastic in my mind, but is it practical? I only ever carry around a laptop (and associated cables) and some folders. I have an STM Backpack, but the creases it leaves on my jackets are not very good for my suit.