Let me play in the Sl ski thread for a little bit. Today, I was out on my Blizzard Sl's and just kept smiling all day long. I can carve and control this ski so much better than any thing I own. Helluva told me a few years ago that he's not a fan of this ski, and, he tells me that a morning on his Fischer SL's is a lot of work and requires great concentration. I believe him and would want to actually ski full bore WC Sl ski just for the experience. Not something I'd buy on a whim.
My Blizzi's, in 165, just perform as long as they stay on edge. Fast edge to edge, but, also easy to transition into brushed turns. So, I doubt they are in the class that Dan, Max, Helluva and JB describe in talking about a WC Sl, much closer to de-tuned carver. After 4 plus hours, it's time to change to something much more comfortable to ski.
The Sl ski experience is not making my potential choices about a 'Shape replacement any easier. An absolutely meaningless story is that the best technical skier and racer that I ski with on a regular basis, skis the same ski in an older version and just leaves RR tracks on steep, icy headwalls. He bought it at a yard sale and his Nastar handicap is far lower than mine.