Vaccinations?

What vaccinations should I use for my new horse? I just got a horse for my birthday. He is a grey gelding. He is 3/4 quarter horse, and 1/4 Arabian. I live in western Connecticut. I know he is at higher risk for West Nile Virus since he is grey, and I live in a mosquito- infested area. I know I should also get him rabies and coggins, because I plan on showing him. What other vaccinations should I get?