Coiler, Donek, Prior, Madd. If you're serious about getting back into alpine, there would be no point in getting a used Rossi.
If you really want a high speed board like you say, the Madd 180 is one of the fastest stock boards out there. Their other boards (170, 158) aren't intended for super-g speeds, and they're narrower (18cm).
As for Coiler, Donek, and Prior, it's hard to go wrong there. No need to look any further than these four, IMO.
There are some tips on buying a new board in our Welcome Center.