OP, stunning, stunning boys. Absolutely drooling over them both.
My appaloosa filly is a good example of one with a high percentage of AQHA breeding. The furthest back I can trace her appaloosa ancestry is "gray appaloosa mare, 1946". That said, she is a pretty amazing horse regardless, but if I ever breed her, it will be to a shuffling foundation stallion. I think its a shame they don't close the stud books, its getting to the point with many registered appaloosas that they are just quarter horses, sometimes without even the spots!