I say try on whatever you have in the local shop (new or used) and choose the ones that fit the best. Like snonasty said, stubbing your toes hurts, I had that last year.
Boots, to me, are the most important part of your set-up. If they're uncomfortable, you're not going to enjoy being up skiing.
To the person who said 'I spend my money on my skis', well, you are retarded. Skis don't really mean much when it comes to your skiing skill and style and whatever, whereas boots can make a difference. If it's uncomfortable to land you'll be finding a way of landing that's more comfortable for you which could look kinda dumb, or you could not go big at all because of the pain.
g e t h y p e d . n e t
'I read this book, and the murderer/rapist was named Matt Harvey. It made me laugh while I read it.'