Thoughts on spotted doe.

Just an FYI - the concave forehead on that buck is considered a breed fault. I would pass on him.

There is a grade A goat dairy in Black Mountain (Round Mountain Creamery rmcreamery.com) and I bet you could pick up a good dairy buckling cheap from her. He would be ready to breed your girls by 5 or 6 months old and then you could have dual purpose goats and maybe keep a doeling for some milk? Might be worth checking out as I betcha that dairy has some spotted Nubians, maybe even brown or red ones like your Boers...

Kitty

The biggest one that I have read about is there is no forgiveness on the mouth formation. Currently, you can have up to a 1/4" lee way in any direction, but here is a copy from ABGA :
I. CONFORMATION
HEAD
The head should be prominent and strong with brown eyes and a gentle appearance. The nose should have a gentle curve and wide nostrils. The mouth should be well formed. The goat should have no incidence of parrot or monkey mouth. Teeth should erupt in the proper sequential positions. The forehead should be prominent and form an even curve linking the nose and horns. Horns should be dark, round, strong, of moderate length, positioned well apart and have a gradual backward curve before turning outward symmetrically. Note: Animals without horns, either natural polled or disbudded, will not be discriminated against in the show ring, but are ineligible to pass inspection for ennoblement.
Ears should be smooth, of medium length and hang downward.
FAULTS: concave forehead, straight horns, jaw too pointed
DISQUALIFICATIONS: blue eyes, ears folded lengthwise, short ears, parrot mouth (short lower jaw) or monkey mouth (long lower jaw) at any age

I love the spots, but would caution against buying a goat that is "flighty." It's not going to be near as fun to keep (or as easy to keep up) as a nice tame goat.