What's the best bag for MacBook Pro?

I like Timbuk2, especially for biking, and for cramming stuff in quickly.

http://www.timbuk2.com/tb2/retail/catalog.htm

This is likely NOT what you are looking for, but for others who wander in here that are looking for a stylish women's bag that doesn't look like a briefcase: I just got a MobileEdge Ultra Tote, and it is fantastic. I wanted a tote that was not ugly, that would go to work and that didn't look like a laptop was inside.
I am pretty picky, and was worried about it, having ordered online, but it's great. Doesn't have multiple pockets for cables, etc, but enough room for everything. I also throw a text or two in there, still closes.
I have the Booq vyper sleeve for my 15.4" mbp, and it fits perfectly in the padded cell. Well padded and secured, but I'm glad for my sleeve (I'm a chicken).
Great bag. Amazon had the best price when I bought.

sfbags.com has great quality bags. ebags.com has a big selection of many brands and types of bags.

My choice is the Brenthaven, smart design, tough and comfortable.

BTW, and this may seem self serving, but I upgraded to a 17" MBP in Aug. from a 15" PB and still have the 15" Brenthaven BP with removable sleeve, like new, if you're interested.

MacBook Pro 17"/ 2.16Ghz/ 100gb/ 7200rpm/ 2gb Mac OS X (10.4.8) Mac Mini 1.5Ghz/ 80gb/ 1gb/ Vaio 2.8Ghz/ 2gb/ 200gb XP Pro

Gotta agree. Brenthaven backpacks have a ton of room and their protection compartment is a must have for piece of mind.

I just got my new MBP and I am now using the Sanwa MBP polyester slim bag (IN-GMC15BK) double with my Boblbe-e Megalopolis backpack which has a dedicated slot for laptops. This combination works great for traveling with a lot of protection.

http://www.comroad.co.jp/os/index.php?mainpage=product_info&productsid=18793
http://www.boblbee.co.jp/products/megalopolis/index.html

Same here nothing beats Brenthaven for build and quality. I have the backpack and it holds both my Thinkpad and MB Pro 15"
and the rest of my electronics gear.

I use this diving regulator bag and put the MBP in a sleeve. It's super sturdy, super padded, water resistant, 10 years old and still looks like new.
It fits everything I need to take: mouse, hard drives, cables, hubs etc
http://www.stahlsac.com/products/W030-B.shtml

http://www.mec.ca/Products/productdetail.jsp?PRODUCT%3C%3Eprd_id=845524442545303&FOLDER%3C%3Efolderid=2534374302699713&bmUID=1160835844248

Nuf said. I have one and it kicks ***. The MacBook Pro fits like a glove.

www.marware.com has a great selection of bags and sleeves for all apple laptops. I just got a sleeve from them and I love it, great quality.

I cannot recommend a bag that you should buy, but I can recommend one that you should NOT buy for any reason. I purchased this bag with my laptop, becuase I loved the style, color, and functionality of this bag, but I was holding it by the hand strap, and it slipped from my hand, and bearly impacted the ground, and my MBP paid the price. It warped the case on the side and front, and broke the latch that grabs the hooks with the lid shuts. I fixed it all by taking the laptop apart, but dont make the same mistake I made. More pading the better. I made a 2,000 investment in this laptop, and a 70 dollar bag could have complete distroid it. All that having been said:

Dont buy: http://www.stmbags.com.au/mediumloft

Buy: http://www.justcases.com

gazooks

u still have that '15 bag?

I second Peter's suggestion of WaterField Designs
http://www.sfbags.com/index.htm
I've been very happy with mine.

Cheers

The best I have seen.

http://www.acmemade.com/

I love my Brenthaven bag. I did not want a hard case so this is perfect!