He's a pretty boy, but to be honest he's not outstanding enough to be left a stallion, in my opinion. His front end doesn't look correct; he almost appears to be knock kneed. I realize that's partly the camera angle, but at the very least he's toeing out.
I'm also not horribly fond of his neck. It looks better in the second pic, but the first profile shows it as being very thick and almost ewe. At his age I'd prefer to see it a bit more refined (it'll just get heavier as he matures.)
Other than that, he appears to be balanced well enough. It's a difficult age to critique a horse as they tend to be going through their gawky, gangly stages, rather like middle school kids