Starter: do you mean to cycle the tank or after the tank is cycled?? This may have been covered before but if it is a newly set up tank and you are looking for fish to CYCLE the tank then I don't suggest any - use shrimp from the grocery store or fish food (cheaper, cheaper, cheaper). If first fish in AFTER the cycle and all chems are good, then I would suggest something like clowns, dottyback, gramma...
What sort of fish were you looking to keep in general?