I'm not a real ball snob, but there are several brands that I usually just leave sitting where I find them. Pinnacle has always been one of them. Now you have me thinking. I might have to give one of these a go since it doesn't sound like much of an investment.
Speaking of "fringe" balls that seem to perform, I hit a yellow Volvik I found the other day (although these balls are getting to be increasingly less "fringish"). I really liked the way it performed. But the ball that has always been crazy long for me is the Nitro. I have always wondered if they are even legal since I consistently hit them longer than other balls.
(Admittedly, I've only hit a few of them that I have found. Haven't hit one in years.)