I have used only Full Tilts for about 12 years (had Raichle comps back in the day). The 3-piece with the buckle on the ankle bone is the only boot that really locked down my small ankles. I still love them, but I want a little more stiffness and response. (I may try the 8-flex tongue and a stiffer liner...)
Me: 53, Part-time instructor (2nd season); never raced but I'm thinking of doing masters this season.
Aggressive, quick feet (I liked the lightweight FT's) but I'm not so powerful.
The Nordica would give me the 3-piece in a stiffer shell, but if the vacuum or Salomon custom can lock down my ankle, I might prefer them. I've heard the Fischer's are light.
Assume price is about even with the deals I can get.