i feel like a 55 i too little for a pair of either of these fish. You could do a single of either IMO. I prefer the GT because i think they're prettier and have a better personality. In my experience, JD's are a little more skittish and tend to hide a little more. the GT's that i've owned havn't been as friendly as an oscar, but were a lot more interactive than my JD's.
you could also look at acaras, severums, or pairs of jewels, firemouths, rainbows and other smaller
you could also look at acaras, severums, or pairs of jewels, firemouths, rainbows and other smaller