I'd go GT for a "showpiece" specimen, as I have always enjoyed the (gold saum) green/orange/gold color combo. Carpintis are very nice as well, just not as flashy, IMO.
I actually have 7 GTs and 6 carpintis at the moment. I'm still trying to decide which ones I'm keeping and how to distribute them among my tanks. Luckily, the carpintis are still only 1.75"-2.25" and growing out separately from the GTs, so I've got some time.
To the OP: Hit me up on PMs if you'd be interested in rehoming some of these guys.