I have three in mind, and I can't decide which one! I've heard good things about all of them but have no idea how to "judge" their students abilities or anything.
1. Southern Hills. Things I've heard: Good instructors, hard to get into (whatever that means??), and not very personal (run more like a business). Home
2. KJM Equestrian. I've heard its nice but small, and a coworker of mine's friend gives lessons there. KJM Equestrian, LLC
3. Saddleback Equestrian. I've heard it's a good place and they have really nice facilities and horses. SaddleBack Equestrian
ETA: I'm planning on private lessons.