Also if you are looking for a bag that does some interesting stuff for a relatively low price, check out the Genius bag G4.
Use promo code "Get40 for $40 bucks off" (drops the price to $198 US).
I don't own it but the included cup holder, laptop compartment, quick access umbrella and laundry compartment for a 22 inch carry on are interesting features to me. It's a 4 wheel spinner though.