I have a water bottle with a grip tab on it - like this one:
http://www.runningwarehouse.com/descpage-AHHB.html
My only complaint is that it sloshes when you're halfway through :P But that'll happen with every bottle -It takes away from the zen of the moment
I wasn't a fan of the hydration packs for running, I just couldn't keep cool properly, and never quite got into using a belt regularly
Sorry I can't help more with choosing a belt though
Good Luck!!