I suspect, given your level of skiing acumen, that skis made in the last 5 years, even high-end performance skis, will feel easier on your body than what you're used to. I'd recommend a Radar Vapor that's perhaps a bit big for your size, say a 68" ski. That, or a 67" Senate, which is 2/10" wider than the Vapor and is capable of going deep into the course at 34 MPH but is an easy ski to ride well in open water. This is what I ski on at 250 lbs (69" Senate Pro) at 34 MPH. It supports me just fine, and has gotten me into the green loop on the course, though 9/10 of my skiing is open water.
Edit: don't be afraid of "wide ride" skis. These aren't like the Connelly Big Daddys of old. Even my "goof around" ski is a really wide Radar Terrain, and that thing is a blast in the course at lower speeds. My Senate is technically a "wide" ski and it has the exact same rockers, bevels, etc as the Vapor, just a tad wider for more support and better speed through the turns at speeds below 36.