Yeah, the goby was the first one i visualized in the tank when i decided to start one.Had to get a perc for my wife first, though.
Stumbled on him a couple of days ago ,so I went for it!
Just to let you know , the water and liverock was from my 55 gallon tank that has been running for 4 yeays! That is why things are going so fast!
I know its hard ,but don't rush it with a new system.
Maybe buy One specimen at a time and wait a week or two before the next!
How long has your system been running? what are you planning on buying first?