I don't know much about the rossi mogul, but last year I was on the 1080 mogul. That ski is phenominal!! It just has a tenancy to fall apart. As for bindings, I have one of the rossi axial (pivoting heal) bindings on my 1080 moguls. I really like them. It has a shorter mounting surface on the ski, and the toe has a true upward release (as opposed to diagonal upward release.) So I'd say go with one of the Rossi axial's...if not for anything else...it will double the warrenty of the ski (putting a rossi binding on a rossi ski.)
I think a lot of people on here would agree that look/rossi bindings are top notch. Marker, I'm not a fan of the top toe release, and Salomon makes a pretty nice binding, but I've had problems with the binding shell cracking.
Personally, I like the P14 and if its the right price, I'd go for it
next year's twisters are the same as last years i think, i have the 'limited' ones, so they're the ones that are basically the assaults, but they're very nice, and my friedn have the normal twisters and they all like them, and another ski i heard was dope were the volkl dragonslayers
I heard the mambas were nice. I havent used Look equipment in a long time but maybe Ill give them a shot sometime.
With the skiis now it seems like you should use whatever binding and boot combination are recommended.