It's time for the $150 battle in our running iPod Dock Bracket. In one corner, we have the Logitech mm50. It's sleek and has excellent posture. We're guessing its grammar is pretty good, too. In the other corner, we have the alleged steroid-pumping Griffin Amplifi. Raised on the streets, the Amplifi showed up with a grudge. And right about now, the mm50 is wishing that it were matched by weight instead of price.