Just curious if anyone has this incase bag: http://www.goincase.com/products/detail/vertical-sling-deluxe-cl55037 Kind of pricey, but it seems to be what I'm looking for. I want a very slim backpack or sling bag for a future MBA, with just enough room for a mouse and a notebook and a few accessories. Does anyone have this and can offer a review? Or suggest an alternative? I'd also like to hear any reviews about this one: http://www.goincase.com/products/detail/canvas-vertical-sling-cl55036 Thanks for any help, I appreciate it!