The tank, stand, and room came out really nice!!!
I'll add my 2cents on stock list. There are plenty of large Tanganyikan and Haplochromis Africans that can be bought small and realitivly cheap and grown into 8-10"+ fish with awesome colors. The associated Synodontis' with AC's and some of which can get 10". They will work with your crrent stock. A school of Spanner or Filamentosus Barbs to hang out w/the Tin Foils. Rainbows are a nice sized schooling fish and would get big enough to probably stay out of an O's or rays mouth. Others may be Geo's and medium cats.
Dats, Giraffe Cat, and PBass will give plenty of action if wanting larger preds.