Choosing a wet slipper clutch - Used EVR, Used Sigma or New Dukabike?

[The ModFather]

Any comments on these three I'm in the market for a wet slipper clutch for a sport 1000. The Sigma is relatively unknown to me. The EVR is supposed to be good but is a used EVR better than a new Dukabike slipper clutch?

[koko64]

Sigma have an interesting website worth checking out, including Ducatis in general. There is a piece on their clutches.