Wickwerks for the win!!!!!!! Seriously!
I run over 20 different bikes. I've got all sorts of chainrings from Shimano 105 to Dura Ace as well as Campagnolo Mirage through Chorus. Even Suntour Superbe Pro and others. The ramp system on the Wickwerks is all they say it is. I'm running thier non-standard 34/53 setup and even with the huge jump the shifting from small to large is amazingly fast and direct. Better than anything I have and with nothing but a normal FD shifting. I can't say enough about how pleased I am with mine. They are heavily used overseas in the pro cyclecross circuit.