I've looked at the Brenthaven ones and wasn't THAT impressed for the money. I've looked online at the ATM Sports 2 and it seems quite good. I'm not sure whether to get a TOUGH sleeve (as in maybe heavy) and a decent backpack or a laptop backpack. I need to carry my MBP 15", charger, external 3.5 HD, cables, a firewire interface (Apogee Duet) and books, mags, etc. I want to not have to worry about my MBP at all. I don't want something I'll still fanny around with! I'm in London so if anyone can suggest something I can look at that would be great also... I don't know London too well.