Ever thought of doing shrimp? Bumblee bee catfish? Banjo Catfish? Kuhli Loach's? Clown Pleco? look into Debauwi catfish also, i havent ever seen any in my LFS's but i hear there cool. For a nice schooling fish, Danio's, Bleeding Heart Tetras, Rasbora's, Cherry barb's are nice (females are lighter red than Male btw and try to get only 1 male) Id personally suggest Krib's over Ram's but thats just me, i didn't like my experince with Ram's and i like Krib's better now, but to each his own
Good luck, upload some pic's of your gouramis, id love to see them and your new tank to