Hm. Well, here's my one filly, and her and her brother and sisters went for the most money at the sale I got her at, so that has to say something about her lines:
Lucky Magic Belle Quarter Horse
I like my other mares breeding a lot more:
Docs Queen Cutter Quarter Horse
Dry Docs Cutter has sired a lot of good barrel/rope horses in my area, at a sale, a yearling colt of his went for $1800.