Board sizing...

I'm 6'2", 195 lbs, with 11.5-12 size boots. I currently ride a Ride
Mountain and like it because of its width but want a board that is a bit
quicker turning (faster edge to edge) and more agile. As in something I can
play more on as in the parks...

Some have recommended just adding Palmer Risers to my Mountain for more
leverage... Some shops have said that the risers will effect the "under
boot" flex of the board. I saw a new board with a "riser" built into the
board core... For both feet, with awesome flexing under the feet.

Any recommendations? Go with the Palmers on the Mtn or a narrower board?
How short would "you" ride at my height and size. Do the new bindings with
the toe and heal "lifts" really work? maybe just a good freestyle board
with new bindings?

Any tall riders out there on park boards??