Yeah I don't like crowded tanks either. I mean, if you have a bunch of little guys even then it doesnt seem crowded because theyd ont take up a lot of space.
When my 125g is up and running I'd like to have one of the smaller tangs - i like the way the kohls look with that yellow eye or maybe a purple one.. Haven't decided yet... a pair of clowns, a blenny of some kind.. and if i could a cowfish would just be amazing. i've always wanted one and I am surprised to hear he's a model citizen.
I guess the trick is to just get him early and get him hooked on good food first so he isnt tempted to nip at anything.
Very cool tank! I didn't know the sailfins were lps nippers either.. learn something new every day!