Convict's are much cooler. Get another convict, get a Sajica, Carpintis would be cool. Or a couple of those "Deppi" that are going around -- those look sick.
Or a buch a Regani. Take forever to grow up, but when they do, they look awesome.
I originally stocked the 75 with a firemouth, convict, and what i thought was the severum. With realizing that the severum is actually a convict i moved the firemouth to a 40 gallon (he turned out to be far to docile for the convicts and just hid) and picked up a texas to go in with now the 2 covicts. I actually went to the lfs this evening as i had seen some beautiful texas cichlids there this morning. Everyone seems to be happy for now and if the texas gets to aggressive i have other tanks to move the convicts to. I have basically replaced what i thought would be a severum wet pet with a texas wet pet. I guess it all worked out in the end..