I've tried a couple of those skis, and so here are a couple reviews
My stats-
135lbs
5'9''
Expert skier doing freeride comps next year.
Atomic Bent Chetler
183cm
I understand now why this ski sold out in December: it's that good. This was the most playful ski, along with being the lightest. Coming from a 105mm ski, I was impressed on how it doesn't feel like a really fat ski on groomers. On my groomed run, it performed well, with some slight tip flap when I was going fast, but still felt stable. I was able to do any turn I wanted, its especially excellent in shorter turns. In the powder and crud the Bent Chetler held up extremely well, and was lots of fun to be on. High speed straighlines were the Bent Chetler's worst skiing, and it did ok. This ski is a playful skiers daily driver.
Rossignol S7
188cm
After going to the Rossignol booth about five times to try to get this ski, I was disappointed with what I found. The S7 is the Indiana Jones 4 of skis: very overrated and disappointing. The rocker and soft flex create a very forgiving ski, but not much else. I didn't feel stable on this ski at all, and had a very hard time skiing anything not powder. The S7 is awful in crud, with lots and lots of tail flap. Also the rocker makes it extremely easy to become skiing in the backseat in if you're not careful, and I almost had the crash of my lifetime because of it. Maybe I should've tried the Super 7, but the 188 was one of the worst skis of the day.
Atomic Blog
177cm
I felt the Blog did exactly what I wanted to, but the softer, more forgiving flex along with rocker did cause some instability. However, some of that was due to the length. I demoed it later in a 183 and liked it much more. This ski is ridiculously poppy, and skis like a more versatile Bent Chetler. Overall I was quite impressed.
Atomic Blog
183cm
The 183 is much better than the 177 Blog. I found the longer length had all of the pop of the shorter ski (a ton), but felt much more stable. This is much more versatile, and fun. It's not really a big mountain ski, but a strong contender for my favorite ski of the test.
K2 Obsethed
179cm
I came to the demo wanting to try a variety of skis, with differing rocker and flex patterns, so I came to the Obsethed for the super soft ski. Honestly going in I had low expectations, and was blown away. First of all this ski is scary soft, especially in the tip, and almost the entire ski is rockered. However, it's stable and fun. The rocker did chatter on groomers, but in off-piste snow it was pretty good, as long as I stayed out of the backseat. All turn types were possible, and the Obsethed was excellent in softer snow. This is too soft for a daily driver, but it was a good ski, including the graphics . I think this is what the S7 intended to be.
With a 126 waist, it looked perfect for powder, and able to make it back to the lift. I tried really hard to demo it this year, but it was sold out too quickly.
