Reccomendations for off the peg courier bags?

bigben What do people use by way of shoulder bags? I'm not looking for anything too gargantuan, size wise, if it was built for a 17" laptop it would likely be the right size for me.

Crumpler and Timbuk2 are obvious candidates, what others should I look at? Something, brightish colours and tough as nuts would be ideal.

Thoughts?

head to condor and go to the basement. they've got quite an array of bags and try some on. the chrome bag i've got is very good, but i hate when people push the seatbelt button.