ornates are cool ive looked them up but they require bigger tanks i like ancient fish now i use to be all cichlids mainly good ol oscars but recently a brought a brown knife and i love him so much i named swirls
if ur getting a 125 get some more bichirs, I just got a delhezi and love em, and a 125 is 24" wide i believe so you'd probably be able to keep an ornate for most of its life
125 is 6 foot by 18 wide. 120 is 4 foot by 2 foot wide. anyways. id shoot for a 150 ( 5 foot by 2 foot by 2 foot ) or a 180 ( 6 foot by 2 foot by i think 2 foot )