Kinda sounds like what I'm building in my basement 15l x 5w x 4h ply with a 12' x 40" low iron viewing pane. My filtration is 2 36" pressurized sand filters and if I can make it work 5200gph reeflo tiger shark driven reverse undergravel through 6" of Estes permacolor (black of course). Its going to have a large area in the back taken up by Crinum thaianum and a single large Echinodorus sp. somewhere in the middle. My stock list as of now is 8x Cichla orincensis, 2x Cichla kelberi, 3x Crenicichla sp. Xingu I, and 2x Brachyplatystoma tigrinum. I'm still looking for 5x Acestrorhynchus falcirostris, 5x Chalceus macrolepidotus, 3 - 5x Hydrolycus tatauaia, 2 - 3x Potamotrygon leopoldi sp. Black Diamond, and 2 - 3X Potamotrygon schroederi. I think thats it I may have missed a few things but thats my dream tank and it's slowly but surely becoming reality.