I looks for days for the perfect bag and tried out 4-5 on a test basis. The DAKINE Liberty is exactly what I was looking for! Nice and lightweight on it's own...especially important since I'm adding enough weight!
I live in NYC and it's great to pack for an overnight stay, more narrow and tall which is great for the train. I've been lugging it all around with my laptop, work binder, jacket, purse, etc.. Great find!