why not take it up a notch and try to find a pair of Apistogramma....
gouramis are related to the betta fish and their temperament tword each other are just like the bettas. treat them as such. ive even seen perfect pair gouramis snap on each other leading to the females death (usually)
Despite everyone telling me it wouldn't work, I have a pair of dwarf gourami males in a 20H that do fine. The are a bit nippy towards each other, but the tank is heavily planted and has lots of hiding spots. I think the key is giving them enough cover to break the line of sight if they are being chased.
honey gourami's tend to beat each other up so im going to wager that cherry shrimp wont stand a chance in teh tank. i have sparkling gourami's with dozens of wild shrimp. Jungle style tank where line of site is broken up nicely. They live with a large betta and everyone gets along nicely. it helps that the betta is old and doesnt put much effort into the chase
Most dwarf gouramis sold in stores are diseased & don't live very long, unless you get some wild stock from Frank. Also, gouramis feel more secure if the water's surface is covered with floating plants, which block out most of the light from the other plants. I'd recommend 15 cardinals & 6 Sterba cories. You'd be surprised how large cardinals can grow if they aren't stressed out.