Best for what?
The Ultremo is their top of range tyre, and looks very nice indeed. Some say it cuts a little too easily, but to balance that I've seen pics of a tyre that survived what looks like a tyre killing split (held together by the sub tread layer) and allowed the rider to finish their event.
I've had good experiences with the Stelvio (wire bead, 25c) as a commuting tyre (rolled nice, fairly durable, grippy).
The Stelvio plus seems like a good compromise between the bombproof M+ and the demands of a road tyre for lightness. (Has the sub tread rubber, but in a thinner layer)
The Stelvio Evolution is their entry in the front/rear specific tyre market (like Conti's Force/Attack combo).
