You wont run anything else after you try a kit bag. I had a Koala before and it does not even compare to the kit bag. A lot more comfortable and just the right size.
www.hillpeoplegear.com Another vote for the Kit Bag. It's PERFECT in so many ways-----------comfort, accessibility, organization, size, price, USA made. Great for hiking, backpacking, mtn biking, and probably motorcyle riding (just haven't got the bike yet). I've got two Kit Bags, and recommend them with confidence.