Yeah I see what you mean, unfortunately the only plants I have a lot of are the red ludwigia and the water wisteria, neither of which I really want to use in this tank. the crispus is just a wee little thing yet. I have no real carpeting plant, it's impossible to find anything like HC or glosso locally :S I am still looking for new stuff every few days though... like I found the crispus last night.
I see what you mean about the java fern though, mine really is a beast, it's probably taller than the tank LOL. It's just so nice, I want to show it off... it's shoved in the back corner of my 10 gallon and bent in half because it's so tall.