We had a powder brown tang that completely terrorized all the other tank mates, his favorite fish to pick on was our foxface. I am amazed that our foxface didn't die from the stress the powder brown was putting on him. We no longer have the powder brown tang, however we do have a happy foxface. We did add a lavender tang (about a month ago) to our tank and everyone is getting along great. Also our lavender tang has a lot of personality as well as nice colouring. Check out
www.themarinecenter.com (you may have to click on the pic of the fish you just searched for, for more info on it) there is a lot of info on many types of fish on this site. Nice to hear someone is doing their HW before buying the fish
believe me I learned that leason the hard way!