Colby- I got that bag from Title Nine. It was on sale and was a good deal (
www.titlenine.com). It had the stabilizer strap, and the shoulder strap had a giant padded part that I liked.
I had to return it, tho because I'm not able to commute anymore (well, until I find a safe route...hopefully soon).
Check Title Nine. I think it was called the Aussie Sport Bag. It was big, but not too big. Def. big enough for the laptop and some other stuff. Nice pockets, and I really liked the front closure and the reflective panel on it.