Dressage is right, the biggest problem with sending him to San Diego is that to ride Citrus at his full potential lessons with the trainer is a really really good idea. I'm fairly sure the trainer would want to see you on him and work with you both a couple times before heading home.
If you want to shop for fun, one is Monica Albair. There is another named Manuel Campos (who I'm not *as* familiar with, but I've seen his horses and they work nicely). You may be able to browse the NRHA website for more names closer to home.
Citrus, an idea of budget would be helpful. There are some darn expensive reining trainers out there.... and they likely won't take just any horse; they would want to know what makes you think he has the potential to be a good reiner. Beyond that, you would have to have lessons as Dressage pointed out so you'd be able to ride him after his training.
Good ones that have won a lot are going to be $1000.00 to $1500.00 a month. They will not accept horses that are not bred to be champion reiners and their apprentices will actually be riding the new horses until they reach the stage where they are ready to be finished. GOOD trainers are actually spending a great big part of their time showing at the National and International level.
Citrus, you never answered my question. What makes you think he is going to be a great reiner? And why do you need to send him off to the best trainer in the world? Aren't there good trainers in your area?
Dressage10135- I am not going to answer it because I don't want to risk someone shooting me down based on something I posted on the internet and having never seen my horse..... For pete's sake, I told someone my horse had long hair and got tons of cushings suggestions for my then 4 year old. This board is fantastic, but they are not always right.