Looking at a boot for my girlfriend who I am going to introduce to skiing this winter. I want her first impression of the sport to be positive and know from experience what crappy rental boots can do to morale. I'm hoping to find a good fitting boot with performance characteristics she can grow into. I don't want to stick her in a sloppy beginner's boot since she's very athletic and is serious about learning.
Unfortunately I don't know that much about different women's boots, particularly the flex characteristics of the various manufacturers. How much flex is too much for a beginner? How much is too little for anyone serious about the sport?