I just purchased a pair of S12's over the holidays, and wanted to give you my impression. I was able to demo them in 176 from the ski shop (Cupolo's) at the ski resort in WNY.
Conditions that morning were mainly groomed (firm and fast, but not ice or hardpack). No bumps. The first run was used to get a feel of the skis without pushing too hard. Nice easy mainly skid turns without holding them in a carve. My first impression was that they were not much different than my Salomon X-Scream (185's).
Second run was down a wide open blue - prefectly groomed. I wanted to see how well they held an arc so I pushed a bit harder and let them carve their natural radius. WOW! ... what a difference. These skiis wanted to go. The harder I pushed them into the turns, the more they accelerated through. I was flying by the time I got the rythm of the natural radius of the ski (~16m).
Since I had a chance to ski along side the race team that morning, I found myself making fast GS type carved turns (without skidding the ski). I soon realized that this was exactly the ski I was looking for, so I went in at lunch and purchased them.
I have skiied them a total of 4 times so far and each time they feel better. I had to learn to adjust my technique from my early days on long straight skiis. The S12 definitely wants to be skiied in all 4 edges (compared to the 2 edge style I learned as a racer growing up). Just roll both knees into the turn and hang on!
I have not found an upper limit yet. The harder I push them, the harder they push back. Rock solid stable and oh so smoooooth. I can't imagine a better ski for me.
I agree with ccnway. Check with dawgcatching on his prices.