Rode a SS and an Alpine.
*I* preferred the Alpine, significantly so. However, there's a significant price difference between the two. I sold the SS to a mate who loves it and several other guys have them and regular 456s. All think they're great. If money / budget is the deciding factor it would seem a no brainer – SS.
When the Evil Sov's first came into the country (ish) I test rode one (same one as STW tested). It was lovely but in the build / components etc it seemed a bit portly. The Alpine has come closest to the Sov, IMO. Oh, and the price of the Sov' was just insane.
I'm surprised at how well the Alpine rides in general, everyday sort of rides. In this respect I think it's a suprisingly good all rounder. I used to ride a 17 (17.5") MkI PA and I think the Alpine is quite different (to those also recommending it as a hardcore HT). Although fair play the Alpine is a 15.5/22 so quite different in sizing. I think the breakage rate on both is tiny to almost nothing so they're both plenty strong (Mike's site used to have some stuff about his 4X riders using small PAs for racing).
Currently though everything else is sitting unused and unloved in favour of the recently rebuilt mighty Kobe 😎