First of all I have to say that I have not skied the AC20, nor the AC30; I'm just going by all the reviews I've read, and extrapolating using the reviews in conjunction with the various (magazines and web sites) reviewer's description of similar skis I've been on. One review site that mostly agrees with my opinion of the skis I've been able to try is the subscription (20 bucks) to Realskiers.com.
My skis: 165 Fischer WC SC (13-m turn radius), 190 Volant Machete G, 208 Kästle Super G (my old one-ski quiver
Skis I've tried and really like: Atomic SX11
:, Head Supershape Speed
Skis I like: Head Supershape
, Fischer RX8
, Rossi 9S Oversize
, Salomon Equipe SC
, Ellan S12
Skis that I didn' like on hardpack: Salomon Streetracers
, Head IC160
, Ellan S8,
My weight: 170 lbs, height 5'9.
Skiing style: I like to carve groves whenever I can. I also like to ski fast. I've been stuck in Ontario for quite a while so I'm biased to our conditions, can't tell you much about modern equipment for the really deep stuff.
Probably 7 or 8, except that I think I'm much better at high-speed carving and making high-g turns than my level would suggest. I've been skiing for a few decades, but it's only in the last one that I've been at all interested in short turns or moguls. For reference, I've skied everything at Tremblant and Jay peak, on super Gs, at speed (thighs were on fire at the end of Tremblant's mogul runs).
Now about those AC20s:
It's really hard to recommend skis over the internet without seeing you ski. A crucial bit of information is your statement, "Yes, I can carve". If you do indeed use tipping the ski as your main method of turning and prefer to cut clean groves in the snow while skiing arc-to-arc, you need a ski that is designed to do that. The key ingredient for making good arcs is torsional rigidity, and an even flex pattern that matches the side cut and design speed of the ski.
However, as I learned when I stumbled upon this forum, most people did not and still do not learn to ski by arcing their skis early on in the learning process. They ski using what has been called "smearing", "blending", "soft-edge", and various other terms. The key difference as I see it is that the "soft-edge" skiing method has the edge of the ski with a lateral component of motion (snow moving across the edge rather than along the edge). People who learned to ski using this method would be very frustrated if they were put on a ski that did not allow the edge to slip sideways.
Skis like the SX11 or supershape speed, only want to arc; they don't like going sideways. You need to know how to arc your skis in order to enjoy these skis. Arcing is also not recommended in big tight bumps (too much speed is gained).
Ski companies make a plethora of skis directed at a lower level of skier who does not know how to arc skis in order that they can still enjoy skiing while they are developing the required skill to arc skis.
The AC20s are designed with an edge that will allow you to smear turns easier; they will let go easier when push comes to shove. Apparently this makes the ski easier to ski for some skiers.
Some skis, like Nordica Speed Machine 12.2 split the difference.
An other very important thing about skis, particularly for experienced skiers is stability at speed. This is a pet peeve of mine, not just because I'm a recovering high-speed addict. My brother quit skiing after he lost control on his "intermediate" skis skiing to fast. If you are going to ski fast you need skis that can handle the speed. The AC20 will not be stable at speeds you an easily reach on Blue Mountain, no matter how long you get them. On the other hand, Fischer WC or Atomic SX11 (and I presume the updated SX12) will be stable, even in the shorter lengths.
I am in the minority along with my daughter who is an intermediate in being a little confused
: by these learner skis. She demoed a bunch of skis yesterday and every ski they put her on based on her reported ability she hated because they could not hold an edge. She likes skis designed for level 9 skiers even though she is a 6, probably because I showed her how to arc skis in a couple of days instead of putting her through years of smearing turns.