I know I am repeating myself but I would shy away from the dottyback if you want to keep ornamental shrimp (I would assume they would attack hermit crabs too but I don't know that), they are also quite territorial...
Good move on getting new tank, it would be hard if the tank leaked...and I'm sue it would leak at the most inconvenient time...
"What kind of name is Poon?"
29 gallon hex, canister filter, too much live rock, two powerheads. Tank setup June 2012. Two clowns, fire shrimp, 2 chocolate chip starfish, 3 snails