Found your post just now...
My stats, for reference: 1.82 m, 88 kg, level 7 skier.
A year ago, I went to the Hintertux Galcier, Austria, and demoed a bunch of slalom skis. I ranked them on a few distinctive properties. If ranked first in a category, the ski get 7 points, etc. I thinks it's all pretty clear. Here's the full list.
I found the Fischer most versatile and I really liked how damp it is. I just couldn't properly bend the Nordica, that's why it's at the bottom.
Agree the Fischer RC4 Worldcup SC is the one to get. I have owned a pair for a few years and have a lot of milage on them, in all conditions except champagne powder.
I looks like you may have had a bad tune on the Rossi though; I traded with a fellow patroller for part of a morning, and the only thing I didn't like was the way the tip rocker interfered with turn-initiation and the lack of feedback feel with turn initiation. Your SCs probably didn't have the best edge tune either; a proper razor-sharp tip-to-tail 0.5, 3 gives me amazing grip on mine (when new they had a semi-sharp a 1:3).
I weigh about 150 lbs these days, but have weighed from 140 to as much as 180 lbs on the SCs. They will handle any speed you like; I've had them over 60 mph, but don't recommend going that speed on a 13-m sidecut ski.
Cons: Yes, it will make bigger turns, but the turns are not as sublime as making those same big turns on a ski with a big sidecut radius. At my current 150 lbs the CS is too stiff to be ideal in bumps, but still manageable. In over 6 inches of ungroomed (say they didn't groom a run and it snowed overnight, or it's a snow day), they require a lot of skill to manage; they keep trying to dial up a tighter turn than the snow platform will handle and you end up unexpectedly slipping sideways and catching. The solution is to either to be careful to not make tight turns in deep snow or deliberately over turn and know it's going to smear - still not the fun thing these skis were designed for. Similarly if you try going 40+ mph in deeper snow the skis will keep erratically hunting for turns - not fun, best get a gs radius ski for those conditions. At under 20 mph they resist going into a tight carved (railroad track) turn at my current weight. Seems to me they would be fine at your weight at low speeds.
Pros: Holds an edge despite incredible turn forces and hard surfaces (when tuned properly). Makes high g turns. Remains stable at any speed attainable on most ski hills, so if you can't resist the need for speed in a moment of weakness, you don't need to go swap skis. Quick edge to edge. Makes skiing groomers fun.
I would not go any smaller than 13 m, i.e. don't go for the 11-m radius head rebel slalom ski. At your weight the SC would give up a tiny bit to the SL, but at the cost of a more low speed limitations. It's more fun at low speeds to ski a ski that wants to bend into a turn than one that forces you to take on more effort.
P.S. About the small hills only thing. It's more a SL speed only thing (about less than 40 mph). If you're on a small hill you won't see much more than that most of the time, anyway, but if you're on a big hill, you may find yourself skiing faster and making bigger turns than SL skis were designed for. There are better skis for doing that.
