90g Stocking suggestions

[c_scherer123]

I am planning a 90g reef tank. ~80lbs rock with softies + a couple LPS.
I am having some difficulty choosing fish as I am not sure how some interact with one another.

Definately want:
x2 clownfish (false perc)
x3 blue/green chromis
x1 blue tang (I know I can't keep a full grown specimen and have spoke to the LFS about trade ins and they are fine with it)

Perhaps:
x1 Royal Gramma
x2 yellowhead jawfish
x1-2 mandarin (last fish - will have a pod-friendly setup)
x1 orange spotted diamond goby (or some other sand sifter - no starfish)

My problem is that I really like the jawfish and mandarin, but not sure how/if they might compete too badly.
I also need a good sandsifter, but they also seem to put pressure on the mandarin/jawfish.

Any ideas or comments?