One more question. Is live aquaria the gospel on tank size? Their min requirements are significantly different than other places. For example, it sales 125 gallon min for a powder blue tang, yet my lfs and places like saltwater fish.com say 55 gallon is adequate.
I know people get ****ed about tanks sizes, but there's at least some differences of opinion on that.
The LFS's job is to sell fish. I personally would not put a powder blue in a 125 gallon tank. Reef Central's recommendation on tank size for tangs can be found here. It all depends on whether you wish to be successful longer term.