Wow, I just realized how old this post was......I actually wrote a reply and then deleted it. After thinking about I figured I would reply anyway since it didn't seem that anyone ever gave you the input you were looking for.....
Just based on what you said in this single post I would offer the following advice.......If you're not a carver and therefore not accustomed to really bending a ski and stepping on the gas pedal than I would advise you against getting any race ski at this point. I would suggest a medium flex ski with a medium flex boot that fits tight. A great developmental ski is the Rossignol Experience 77 or 80 but not the HD models. A regular E80 and a 90 flex boot with some coaching is what got my son carving. I will continue to work with him this season on this set up. You will develop your skills rapidly on a medium flex set up. Once you can rip that ski, move up to a stiffer flex ski and when you start to overpower the boot move up to a 110-120. Work up to the race boards if thats ultimately where you want to end up. Years ago I tried exactly what you're suggesting and it didn't work out for me. I had to take a couple steps back and work myself into it in the manner outlined.
Thank much, @PisteOff . I later opened a dedicated thread on the topic. Long story short, I wound up on the Head iRally's at 170cm. Some of the people who helped, actually skied with me late in the season, and guided the search. It was a toss between the Rally's and the Titans. But I already have the Dynastar PT 89 @ 179, so the Rally's seem like they would diversify the quiver a little more. I can't wait to try them out!