Well those are mine, and they work great and didn't cost near $600. I have to say that I stole as much fom another member of this forum as I did from emotion.
I honestly cna't imagine what the Kreitlers have over those $100 nashbars that I got, especially if they don't have a mag unit.
I've not ridden the emotions, and after what I went through to build those I might consider going that route (mostly just waiting for a friend to get the welding done). But really it is not that hard. I think that i said in the write up that the hardest thing was getting the Al channel, and knowing what I know now I'd have gotten different stuff that would make the build even easier.
Anyway it was pretty fun, and i get to tell people that I made them. So i guess in the end I'd do it again.
Anyway if you decide to go that route I'm more than happy to give you the benifit of my experience and make your build go alot faster and smoother than mine.
Cheers