Last Fish Suggestions?

I currently have a 60 gallon fish only tank with an internal protein skimmer, filter, etc. I am interested in getting possibly a Long-Nosed Butterfly and/or a Rectangle Trigger to complete my tank. I now have a Flame Angel(2 1/2-3"), Scopas Tang(3 1/2"), Lunare Wrasse(3" in length), and 3 damsels, all about 2" in size. I am wondering from experts out there whether I should get any more fish or not, depending on how much room I have left in my tank. Thanks!
 
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