Those are some expensive bags! I just got a Timbuk2 Commute bag for Christmas. It's a medium and a little snug for my 1520, but it's loosened up already. The bag is the best that I have owned so far and I love it. PRior to the Timbuk2 I used a Targus Urban Messenger bag. It was too small for packing in accessories. The Timbuk2 Commute is the right balance for room and not too bulky.
I found Academic Superstore has some great discount prices on bags from Timbuk2 and other companies.http://www.academicsuperstore.com/ma...gory_id=268870
I was also looking at the Timbuk2 Laptop Messenger bag as well. Both are very nice bags.http://www.timbuk2.com/tb2/products/home