A 41g tank is way to small for tangs a minium of 90g is needed for a tang. There are nice small reef safe wrasse's that would be a good choice, and dwarf angels are nice however some might nip at corals.

I support what the tang police force have already posted.

It is really important in marine fish keeping to go very slowly especially in a small tank like yours or you have lots of problems.

You should be only adding one fish at a time one month apart.

Cool, so ixnay on the Tangs, wrasses and Blennies? Any suggestions as to which kinds? My lights are the Glo T5HO 24" X2 that came with the set-up. It has a Marine Glo and a Life Glo (going to be replaced with better quality bulbs, recommendations as to what type of bulbs?) I am hoping i can use this lighting system with what i want to do, just get better bulbs and at least 1 of them being an actinic.
Does the fact that my tank has 49 lbs of well established rock (they came out of a tank that had then in it for almost 2 yrs), plus the live sand change anything with regards to how 'old' the tank is? Isn't this like the conditions you would have if you moved your exisitng established tank?

The answer is maybe. Sometime it causes a new cycle in the tank.
After the lights are off for an hour or so check with a flashlight. If the tank is crawling with tiny critters a mandarin is possible.