I'd have to go with GL03 on this one. Most of the time it's nothing more than personal taste, but for me the aftermarkets were a little too long and turned down a little more also. As I felt both were grossly over priced I opted for the Hondaline. If these things were for a car they would cost about $40, and the Hondalines are $60 more than the aftermarkets, but based simply on a personal preference I would still go with Honda's.
I have been thinking about getting turndowns. One little surprising discovery may be an issue if they turn down too much. It all started by noticing that the chrome shield on the right muffler had a spot weld break and was sticking out just a little on top. I wanted to get a better look at where the weld was, so I started to remove the end on that side. The surprising discovery was finding a new lean angle contact point. The outer bolts on both end pieces were ground down just enough to prevent a #10 socket from going on. I had to carefully file down the flats a little and tap on a socket. I am really starting to wish I had another 1/4 inch rise on each wheel. Oh yea, I ride on 25 so there is nothing else to gain there…….