Originally Posted by double
I usually drop a half size when buying boots but tried the Burton Ion's last year and had to go up half a size. They pack out about half size but if your feet are touching on the 8's I would go with those. There is a lot of preference in making that choice but I hate having my toes jammed in the front of the boot and if your toes are curled the boots might not pack out enough to get comfortable. You can also try an insole to see if that can give your toes a bit more room with the 7.5's. Good luck!
+1. Boot fit and sizing are intrinsically personal and specific to boot model (not just brand!). I am a size 9.5 in most 'regular' shoes, but a 10 in my current snowboard boots.