I find it hard to believe you've grown out of the 390 boss. Why don't you tell us what you would like/what is missing from the 390s that you're looking for and what you liked.
Otherwise Flux rk30s, they're jib-tastic
Edit: sorry I read this as you've out grown (their holding you back) the 390s, not your foot/boot is too big for your pair
Otherwise Flux rk30s, they're jib-tastic
Edit: sorry I read this as you've out grown (their holding you back) the 390s, not your foot/boot is too big for your pair