Smails, I'll come at it differently. If you want something between the Katana (at 112) and the FX94, that's only 18 mm, so any ski you pick will overlap substantially in terms of float and all around mission. So I'd assume you want something that feels quite different than either, and since it's tough to find stiffer than the Katana, assume you mean flexier than that. Yes? And since the FX is fairly traditional and the Katana is a full rocker, assume you want a third approach, which would be early rise in front, some camber, maybe mild tail rocker. Yes? No? And since both skis are fairly lively in feel, assume you want damp(er).
That narrows it down. The 108 maybe, although it has a traditional tail and to get the maneuverability you want, perhaps you'd need to go shorter. The Stockli Stormrider 107, which has more early rise, more sidecut by far, and is significantly lighter in the 183/4 length. You might sniff around at those. As I recall you're a bigger guy, so they might be the ticket.
But another direction is to get an indie, maybe custom. Seriously. ON3P is known for damp and strong, but plenty of alternatives with early rise at both ends. You can choose weight and flex. Praxis allows you to specify flex, go for snappier and lighter (carbon) vs damper and a bit heavier (all wood with rubber tips and tails), and Keith will personally work with you on tailoring the ski to you. Just been there, done that. They have several models in the 100-110 range that might have your name on them. Folsom will go the whole hog, let you simply specify dims, flex, shape, topsheet. Literally your unique ski. And none of these will be as expensive as a Stockli, maybe similar or a bit less than a Kastle.
Edit: Will add on a piece. In some ways a lot of why I think indie customs are interesting is that they extend the idea of a ski as tool/arrow/metaphor of your choice. We tend to see a ski as a tool that's a means to an end, and so what if it's exactly like the other tools in that stack, however fine they are. With a custom, you get to help design the tool. So it literally becomes as close as you can get to a personalized statement about your skiing until we all own refrigerator sized 3-D printers to synthesize you want at that moment, right after you've printed dinner. There's a connection, an creative and even aesthetic investment, that goes a bit beyond slapping down the plastic.
Now that may not matter. A particular tool by a well respected brand may be a perfect fit for you after you've adapted to it. Or you may realize, correctly, that what you may gain in personalization and input, you may lose in quality control or design sophistication. For instance, sorry but I don't trust true indies - not long established factories that make skis for others, but real local operations - to make superior carving skis. Fat skis, not sure if the precision of a giant Fischer mold is quite as important. Kind of like how some powder pros argue that sharp edges are irrelevant to their sport.
Or at end of the day, your custom ski may still not quite what you want. Many of us here are literally incapable of being truly satisfied with a ski; in other arenas that's called "normative dissatisfaction:" It's normal and expected to be not quite satisfied with something not long after we've consumed it, so we're always a little let down, a little looking ahead to the next, better, tool.
Edited by beyond - 11/26/13 at 7:13pm