I guess it all depends on how badly you want the fish.
Everyone told me that I couldn't keep discus with the fish that I do, but all is well just the same. It's been nearly a year and everything is beautiful.
Who knows why things work for one person and not another. Maybe it's the size of my tank. Maybe it's the fact that I've always been lucky.
The only thing I know is that beyond the importance of tank maintenance and upkeep there are few absolutes in fishkeeping.
Good luck in whatever you decide.