Boots are the most important thing and its not unheard of to spend more than half of your package budget on your boots.
I spent 8 years buying the wrong boots until a boot fitting course and my years of experience found the f22. all boots fit different and getting fit my be a good thing. try to stop streesing about it, and think about whats been suggested. get fit, try on every kind out there. and when it feels snug not painful, buy them.
I have uber small feet. i'm like a 5. I did all of these things and then let go of the feer and ordered what i thought would be good. Everyones feet are different.
The only thing I can say about Salomoon and F series. In my experience, Salomon fit the most people because most companies have really wide boots in their line, and teh F stands for fusion, so you will have less worry about toe hang on your board