Slipper clutch and Rizoma clutch cover

A topic that has been discussed one or two times, I know, but I would like to get a few things confirmed before I throw a big old heap of money at some lucky seller..

I've got the Rizoma clutch cover and apparently the STM slipper clutch doesn't work well with it. Ok, no biggie, I'll go for something else.

That leaves me with the Suter and Sigma ones. From what I've come to understand, the Suter works with the Rizoma cover. Anyone who can confirm it?

Also, would the Sigma work as well? Anyone who can confirm that?

Finally, about Suter vs Sigma. Which one is preferred? There is, obviously, a quite big gap in terms of price.

Cheers, guys.

USA---Suter=Hinson and Sigma= Yoyodyne.
The Suter/KTM/Hinson clutch is by far the best feeling of the two. It wears the pressure plate out too fast IMO.
The Sigma/Yoyodynde is grabby and very stiff but showed NO signs of wear after 6 days or so of heavy racing usage.
I sold my Yoyodyne and will get another Suter when the time comes.

If I ever race another brand bike I will seek out the Suter/Hinson.

Why not the MH clutch cover??
I love mine!!!
Plus Aaron is a sd.net Mate!

Any more advice on which one to get is welcome. It seems on balance the KTM/Suter clutch would be best for me?
spirited road riding and a few rack days is my focus.

Thanks vm.