Sorry Mel, I've been out of town. I'll give you a call...
Once you get a cover, you will definitely need a little friend for your clown!
Great to see that you have a tang on the list

(told ya she'd cave Donny!) I think that with the increased tank size and a great skimmer, you will be able to stock a little more heavily.
On your "issues" list, I would add "does not compete with mandarin pair for food." I think pseudochromids or basslets would be great additions, but the pod population might take a hit, even in such a large tank.
I would have (and did) suggest cardinals too, but I think they would eventually eat the smaller gobies. Saltwater guppies are used as food for the broodstock fish on at least one farm (in HI), so I think cardinals are probably not safe with very small (guppy-size) fish.
Angels would be a great idea! I think there are many that are considered "reef safe" like the swallowtails and some of the dwarfs, although it can sometimes be a fish-by-fish personality thing too. I have a tank-raised maculosis in my 58 mixed reef that doesn't pick on anything...yet, although he gets fed 2x/day and he's doubled in 4 months--he'll be moving out soon.
How about some of the reefsafe wrasses? Some of the flasher wrasses are really pretty, and I think they'd be fine with all of your requirements. I had some in the house pre-fire and really enjoyed them. I'd think that they are hardier than anthias, but I've never kept anthias before...
-Matt