Originally Posted by
chort55
Well if your dead set on upgrading and must go through petsmart, I would go with the cube (less likely to completely blow out) and don't drill it for a sump. Its big enough to upgrade, you can use your HOB fuge, AND you can still maintain it with water changes and not really need a skimmer IMO (yes a skimmer would be better but make due with what you have) and save the money for livestock.
Any upgrade will incur costs for more rock, sand, possibly lights, fish and of course coral, just don't over do it with fish and you will be ok.
That said.. you may be able to find someone willing to trade the giftcard for a better tank.