First, thanks again everyone for the help.
Puffer, great picture. I haven't seen a good pic that really shows off the second shade on blackcap's head.
Dino, like the look of the Fridmani. Availability may be an issue, but I think he's taken the lead.
KerriAnn and KJ, I also personally like the look of the purple firefish (saw a similar one at LFS today), but I'm not sure its purple enough for my wife.
She has a serious addiction to purple.
Before I say anything else, I want to point out the two damsels I have are both under 1" in length and haven't grown at all in the four months since they were paroled. I don't want anyone to think that they are 4" monsters ready to tagteam any new residents. So far, they've been well-behaved members of the tank, and bystanders in any violence.
As far as bioload goes, today I sent a 3" bowtie damsel back to prison (aka the LFS) for bad behavior. Even with that PIA damsel, my parameters were 0 Amm/0 Nitrite/10 Nitrate. My salinity is right where I want it at 29 ppm and temp is 82.
I'm going to try and stick to the plan of adding LR, then the next fish. If I find my bioload is maxed after the LR is added, yes, the damsels will go. But I'm remaining optimistic that my tank will be able to handle one more fish again with LR without drastic measures becoming necessary.
Any more fish of a violet persuasion that people can recommend?
Also, I saw a fish in a coral tank today at a LFS that was a striking shade of purple. I looked online and couldn't find anything. It was almost the same shade as the blackcap's head, but the shape almost looked like a damsel or chromis. Does anyone know what I'm talking about?