When searching and reading through the hundreds of threads alreading on this topic (hint hint), I found out something really interesting.
It seems that Scottwax, the patron saint of hand detailing, recommends Armor All Original, the red headed stepchild of the detailing product world, for a tire dressing.
I've been using EO Wet Tire Shine for the last year and a half and have been happy with it. But two weeks ago switched to the AA. And heck, I've got to say I like it. It hold up to the rain and makes the tires dark without shining them too much.
I picked up a $3.50 spray bottle at Lowe's and will now start buying AA in the half gallons for $10 at Wal-Mart.
I'm not sure if I'd be able to use it through the winter. But we're not really in winter anymore here.