Seriously if I had a big tank like that, some emperors with bigger malawi haps, like bucco's (male lepturus is one sweet looking fish), champ. caeruleus, spilorhynchus, a. christyi (would be the smallest one how sweet is that), and more stuff along those lines.
thats why you start with just a few and breed their brains out. i think it would be really cool if you use the tank to seperate 2 rooms of the house like a wall. but use a huge wall of thr in the middle of the tank to seperate so you cant see into the other room.