I always seem to be the bearer of bad news, but I only have the welfare of your fish and your success at heart.thanks everyone for the help. I'm going to stick with the two males, as they seem to be getting along. also I will add 1 or 2 femal gouramis. I have three silver dollars and plan on getting a fourth. the only other fish I plan on getting at this point is a black ghost knife fish. thanks again.
A Black Ghost Knifefish brings many issues. This is not a community fish in the normal sense, and it requires some very specific aquascaping to keep it healthy. Also, a very large tank. The spine is inflexible, so for the fish to be able to turn it needs a tank that is wider (front to back) that it is, and at least three times longer than the fish. And this fish attains 20 inches (or will if properly cared for) it requires a tank 6 feet by 2 feet. I can detail more if asked.
If you do get female gourami, no less than three, preferably four, or you will almost certainly have problems.
Byron.