I've got a Giro Indicator I think it is, only like $50 and dorky as hell but I only wear it when trail riding so it's whatever.
As far as bags go, I don't know if your a photography type of person but I'm about to get one of these-
http://blicksbags.com/
It's a messenger bag, but the inside has a velcro divider system like that of a camera bag so that you can rearrange/whatever. I'm looking forward to just being able to carry a body and a lens or two with all my usual shit. Plus the pocket in the back of the bag is good for laptops, I've heard.