Heck I dont know shawn.
I dont know your cleaning, feeding or stocking habbitts. I just know what works for me.
I do 25g weekly water changes, removing all detritus I can get too while I'm at it.
I dont overfeed or overstock. I skim to the wet side.
What I'm getting at, I keep things as clean as possible on my own.
I've never liked crabs or astreas. Astreas just flip on their backs and die, hermits crawl all over corals and cause them to keep their polyps in, then eat the astreas...
IF I had a DSB I would have Ceriths in it...
I've always had good luck with the Mexican Turbos, Other than they can be frag makers if you have a branching coral close to the rock.
These guys are big and low branches sometimes break.
They eat what little algae I have growing and they seem to live longer than most.
I had a small algae bloom with this tank when I finally turned the lights on. I added the 6 turbos and it was all wiped out in a week.
I'm pretty much algae free now and if it stays that way (Like I expect) 1/2 will probably get moved to another tank...
A tank your size, I would guess 30-60. I bought mine at Jacks, You might be better off getting that many online. Liveaquaria maybe?