Replying to Boot sizing. killer shinbang. Help!

Im a size 8.5 - 9 (uk) which i think is 9.5 - 10 US.
anyways, im currently riding a pair of head mojos 27.5 if i remember right

since a big flat lander last year, everytime i stomp a landing - heavy on the tails or even a nice landing i get killer shinbang.
can someone gimme some good advice on what boots and what size i should be looking for as im looking to upgrade anyway.

Iv heard that SPK's are pretty much shinbang proof.......if so what size should i be looking??


Many thanks to anyone who answers.