Hey Howe...Ok..now that you have the Watea 84, you want to make sure you don't get a ski that is "too" similar in turning radius and versatility. As you stated, the longer Watea might have been the spot on choice but having said that, what you have will take you dancing in shin to knee high powder using good technique.
I think from how you described your skiing, finding a ski with a side cut that would give you around a 13 meter turning radius would be the "ying in your yang"!
The question here is which ski.......I'm thinking something in a 160 or 165 length. I ski the Head SS in a 165 length and ski that up to boot high snow. That other personal favorite of mine is the Fischer RX8...I think these 2 skis are great choices .....
The RX8 is probably the more forgiving of the two.
I can tell you from what I see on the mountain that skiing fast is certainly no indication of a skiers skills or the rating format for ski levels. Being able to ski a variety of conditions and terrain in control at a variety of speeds probably is more of the benchmark.
Still, you want a ski that is fun, versatile, and fits your skiing style. If the Watea worked....I know the RX8 would be a homerun.
Best,
Gary