Replying to Bootfitting Question

so anyways, long story short ive been using the same boots for the last 5 years, and i got them used for 50 bucks, so i figure its time to get some new ones, ive been wearing a 30.5 size so i went to the shop and tried on a 29.5 in the salomon pro model which is the biggest it comes in, and it was REALLY tight, my toes were jammed against the front. but the guy said that the liner will mold out and it will fit perfectly after a few uses, and when i just had the shell on i could get 2 fingers behind my foot, so should i go with this or look for something in a 30.5?