A) Skip N Zip - paintarosa.com
Probably not a bad horse in person, but his photos SUCK. Both side shots have him at a down hill, and both at odd angles. His back is definitely long and his shoulder just look... funky. The rest of his isn't bad though.
B) Beaus Commander - Pine Ridge Paints---Stallions
Whoa, talk about lloooonnnggg... Pasterns are too short, neck ties in low, throatlatch is thick, shoulder is steep compared to his hip angle, hip and stifle look weak. The first picture of him just makes me think of a cow with a horse's behind, lol. He just doesn't have any "balance".
C) Hustlers Deck of Stars - MJ Painted Ranch
Cute, but no good photos showing his conformation, which always worries me...
D) Some R Unique Shadows - Secluded Acres Horse Ranch - Home Page
Cute guy, but his coloring hides some of his conformational imperfections ;). Neck is short, throatlatch thick, shoulder short and steep, fetlocks short and upright, weak stifle (decent hip though), hocks are VERY high off the ground (long from hock to fetlock, which would make collection and reach with those hind legs difficult), and he appears more downhill than the other studs.
So, A might be a decent stud, so might C, but we don't have any good pictures to judge them by. B and D would makre GREAT geldings