In reply to Owen W-G:
I agree with jk - definitely best to try on several in a shop.
I recently got a WC Summit for doing pretty much what you're looking for. I like the 7 gear loops. It's basically configured with 2 normal large loops each side and one at the back, then 1 small loop each side attached at the top of the belt between the 2 big ones - useful for keeping 2 or 3 bits of gear separate from your other stuff.