Hi. I own the 2nd generation (last) version of the Rossi Sickle 112 and love it. But it is good to know what it can and can't do. (It is the successor to the S6 ski, by the way, as I recall.)
This is the version I have. It is less stiff than the earlier version, and thus better for lighter skiers like you and I. It's still stiff enough to kill crud.
Pro: Both versions are basically great soft snow carving and crud skis. Mine carves or slarves quickly, wide variety of turn sizes, under the crud and powder, and through them, no problem. Like butter. It does not deflect. It is not stopped by either crud or thick powder. It is probably among the best skis at this I know of. Only the old metal Katana (w. 112?) does this better, from what I've heard, and then mainly for really powerful skiers, I gather.
I love skiing the Sickles on the afternoon of resort powder days and for the next few days after: soft snow days, and difficult soft snow days. For a lighter weight guy, the second generation version is best, to me.
Con: It does not float in powder, actually. It powers through it, near the bottom but slight lift, enough lift, but almost like a quick tank. If you want that floating powder feeling, go elsewhere. It is almost the reverse of the S7, which floats well, and charges groomers, but get tossed by crud.
Compared to the S3: I have not skied the S3, so can only go by hearsay: the S3 is narrower and quicker, better for trees and bumps, probably. Not sure about powder.
For an older, more floating but still stiff ski that does well in crud, consider the Atomic Ritual 103, if you can find it (discontinued in favor of the Vantage 100 cti this year, which is a similar, great ski). The Ritual is a super powder ski that also carves up crud and groomers, also bumps. It is not quite as strong in crud as the Sickle (few skis are). But it has much more float. Both skis tear up groomers. I own the Ritual also.
If I had to choose just one and I lived in Utah (or Colorado), and didn't have a wider powder ski, I'd choose the Ritual, knowing I was choosing powder prowess over crud (though both skis can do both).
Hope this helps.
But please demo. Good luck.
Edited by ski otter - 1/27/16 at 6:26pm