You might want to check out the Tamrac Explorer series... (mini backpacks)
Looks kinda cute to me, but it handles well, and is $@!@!$$@! Durable
I've used mine for over 6 yrs now, through rain, snow, and my last 2 reservist call ups. (heheheh, up and down peng kang quite a bit, covering saf newsletter.)
and it's not like the made in china lowerpro series... it's made in usa, and the u CAN feel the difference.
Only drawback is that only Pro foto carries them if i'm not wrong, showroom in plaza sing has them the last time i went 3 mths ago. It may be slightly more expensive but it's worth the investment to your equipment.