I just got some 6" risers for my Mean Streak off of EBay, harley aftermarket for $40, and they are sweet! Try to do that with metric for $40... Thats why I am going to drill my triple clamp this weekend. Got a handlebar pretty cheap too
Also, I don't like the look of the Phat risers, I have the GenMar, and they aren't cutting it.
Plus, the more I think about it, I like the 1/2" bolt holding my bars on better than the 10mm. I mean 2.5mm isn't alot, but it's 2.5mm more...