Yellow Tang?

Hey all, I was just wondering if I could put a yellow tang in my 55 gallon tank. I'm talking about keeping it forever in my system and not removing. It's going to be its permanent home. I'm not looking to upgrade either. My other fish are 2 Occy clowns, 2 damsels, a Royal dottyback, and a bangaii Cardinal. Petco is giving me a huge discount tomarrow. 25% off everything plus a 20% coupon. That's 45% off a yellow tang which is 22 bucks. Now that's a steal! I was just wondering if I could fit one in. I'll get the smallest one there. If not, I'll get another coral beauty, yay!