tangs?

You'll be better off waiting until after you've upgraded to add a tang.

tangs are my favorite fish! the only problems i see with buying fish with the intention of an upgrade is that alot of times the upgrade never comes. and if its going to be a few months before, it just causes stress on the fish when you break down and transfer the fish to the new tank. i would say if you plan on upgrading wihtin the next year, i would just wait like orion said. JMO