Over the two you listed : Goblin Mini is awesome if you have patience, dont mind bottom filling and are not paranoid about loosing misiscule parts. The bellus is a very nice tank, I havent played with it, but flavour wise it is great. Overall tho the one you dont have on the list is the aromamizer - which beats those two completely. I mean if a total noob like me can build on it anyone can, and flavour wise its amazing.