He is lovely.
Actually he says jumper to me, quite a lot, especially with that gorgeous shoulder. He IS a little tied in at the knee but with proper conditioning he's not so bad that it's a big issue. Something to bear in mind of course [so good quality slingback boots, like Elana suggested, will be of use]... but don't ALWAYS boot when you're jumping because that fosters reliance on the boot and then if you forget your boots one day going to a show you're in trouble.
I actually never put boots on my horses while jumping. They're only ever booted for shows. And while coming back into work after a break. Careful conditioning. Boots on at shows, because you will be pushing your horse harder at a show, and you should be fine.
Of more concern regarding his front legs, I don't know if I'm just seeing things but is he a little bench kneed? I'm the only person thus far who's mentioned it though so I don't know...