Which one?

[ayRiz]

Im really confused because I don't know which is the best bag for my 12in PB. I do have a sleeve for it but since I use it all the time in school especially for coursework- i decided that its about time to get a "proper bag". Im about to go to the US for my holidays and that's where Im planning to get the bag. Anyway, I need your advice, suggestions on which bag would suit me best... here are my choices:
tnx!!

Axio Mini Kitty
Crumpler Crippy Duck
Crumpler Wee Bee
Timbuk2 Marina Handbag