You might want to check and see if they really are the curviceps, or the dorsigera. I bought some 'curviceps' last year from petsmart only to find out they were really dorsigera.
I think it actually turned out better for me really. To tell them apart the dorsigera males will have red on their chest area, while any curvecips will not. dorsigera are great though, and if they do turn out to be these I would highly suggest them if you have the room. Unfortunately I only have one female in my 75 gallon, but she is tough enough to go up against fish 10x her size when it feeding time to volley for food, but I have never seen her, or her mate when he was still alive even act aggressive tword another fish, even ones closer to their own size.
I think the curviceps are close in temperment.
EDIT: Sorry, they still are in the Laetacara group too if you want to search for more info on them.