oh okay. after much researching i found out the problem. I wear between 9.5-10.5 shoes but my boot size is a 12. I think I was fitted wrong when I bought my boots (k2 maysis'). I'm going to talk to my mom about getting me new boots, and I believe I'll only be slimming down to a 9.5-10.5 boot. Thus, a 152 evo will be perfectly fine. And this leads me to another quesiton. I have Large Rome 390 Bosses. If I slim down to a 9.5 boot size, will I also need smaller bindings?
I would say no. I've got the same bindings and wear the same size boot you're looking at (9.5). I ordered a S/M rome boss binding first, and when it came I adjusted everything really big and, to be fair, i could get in it but I was like "fuck this". The toe strap just barely reached.
Got the bigger ones and they fit really good. In short, I'd say you're fine.