To get the eel or not

So, the two fish that got me into saltwater tanks are trigger fish and eels. I have a 72 gallon with solid filtration and largely lps corals. The livestock that I currently have is as follows:

3 inch maroon clown
3.5 inch bicolor blenny
3 inch yellow banded possum wrasse
large cleaner shrimp (body is about 3.5-4inches)

future inhabitants(all of which I will be getting at over 3 inches)
dusky wrasse
kole tang

So, on to the question. My LFS has had this ghost ribbon eel (about 12 inches long now) since I started going there and it was love at first site. The only fish that I am really worries about is the possum wrasse. I have been doing quite a bit of research on this specific eel but I would really appreciate your opinion.

So, on a scale of 1-10 how nervous would adding this eel to my current livestock list make you?