I want to just say that for those of you who use the Recon by NorthFace, I'm glad you're happy with your bag, don't get my wrong, but I'd never buy this bag. I currently work for a retailer for 4-5 years who sells NorthFace backpacks, both regular (like the recon) and hiking packs, and for the price there are much better options out there with much better build quality, laptop protection, and customer service.
Booq makes a great backpack and you can sometimes find a coupon code online, they are overall a very expensive company. We got one for my dad for his birthday, I believe it was called the Mamba, really interesting design. I can't speak for it's durability, because I'm not the one using it, but he seems to like it very much.
I have 2 bags for my Powerbook that is almost 4 years old...The following two solutions have kept my powerbook dent and ding free and looking almost as new as the day I bought it, sans a few scratches on the bottom.
First is the
Terminal Backpack by DaKine, really slick bag w/ a side entry for the laptop slot so your laptop is completely separated from everything else. Have had it for 4 years, built like a rock, looks almost new and I travel with it almost every day. It's got 2 inches of padding on the bottom that sits directly below the laptop itself, plus a very padded back and a harder foam padding on the front of the laptop compartment. it doesn't look that large, but it's cavernous.
http://www.dakine.com/street-series/guys/packs/terminal/
I also have a Timbuk2 large messenger bag with a Waterfield Designs (
www.sfbags.com) powerbook sleeve. Timbuk2 also makes a backpack style bag that's great too. I use this one too, but not as much as the DaKine bag.
Waterfield designs is a WONDERFUL company.
My fiancee has a crumpler vertical style messenger bag, but i don't know what it's called.
Also, buy yourself some iKlear to clean your laptop and keep it looking great.
Good luck.