Thanks For shared nice post. I think I'm going to go with Discus. Although I REALLY want the RBP tank, I'd really like a variety. We'll see. If I can et a deal on a 75 gallon tank, I'll get a schoal of piranha.
I'd get a shoal of widebar silver dollars and a super red severum for movement in the middle of the tank, an NTT or nice indo datnoid for the bottom, and a black aro for the top. And I'd get a nice green lapradei bichir too. (Not sure how big that tank is though.) With that stoclist, you'd have a nice mix of color and movement. The widebar SDs would make your other fish more active too.