So, mid-fat with a really active (120mm+) tip, we notice the following:
Nordica Hot Rod Nitrous
Atomic M:EX (there is also the Sweet Daddy)
Volkl AC4/Queen Attiva
Saving, possibly the M:Ex none of those will be $cheap. If you think you'd get enough float by going down to a 75-77mm waist size then a host of other possibilities in the all-mountain-carver category opens up, such as the Elan Magfire 8/10.
EDIT: Post changed entirely,
My fault for not paying attention.