amazing tank! thats so huge! my biggest is a 120 and this one dwarfs it. i really like how you thought of semi-water proofing the stand in case of a leak, i never would have thought of that. also if your still looking for a sweet centerpeice fish then i would recomend discus, or one of my personal favorites, the black ghost knife. black ghost knifes can get quite large (15-20 inches) and will devour smaller fish in the night time (mostly neaon tetras and the like, but i can't find a few guppies.....) but if you are planning to not keep the tinier fish then i think it its one of the most interesting fish to watch.