I am in LOVE with the Eternal Sun line (my Eternal Sun gelding is the most versatile animal on the planet). Eternal Sun was an appendix, so his offspring have the speed and stamina of a TB, and the King and Peter McCue lines for the stability and hardiness of the foundation QH's. Most Eternal Sun offspring are small, old fashioned stock -type horses. They're very fast, very cow-y, and very, very smart. However, it's been a while since Eternal Sun was actively breeding, so you can only find his grandsons/ granddaughters at best. Mine is a grandson but he's almost 19 years old. Here's a pic of Eternal Sun, he looks exactly like my horse, right down to the sock! His star is a little bigger, though.
http://www.crazyhorseacres.com/image...nal%20Sun1.jpg
Here's a website explaining a little more about his history and credentials:
http://www.howard-farms.com/