I've been using an Ugly Stick 10 footer, seems to do the job for me, but where I fish I never have to cast too far out. 5 to 8 ounces of weight typically does it for my set up, and herring/anchovies do the job. I seem to do best when the tide changes, that seems to get them active.
I've seen some people with their 12 footers really cast way out there, crazy!