Thanks for all the suggestions everyone. Lekyiscool, I agree with your suggestion. I've already pretty much decided to do something along those lines. I don't know if I'll go with dwarf hairgrass specifically, or something similar. But I like the idea of kind of "filling in the gap" in the back with something like that. Maybe even dwarf sag. Then the foreground would be something different.
Laura, thanks for picking up on my whole reason for thinking c. parva: it's already a mostly crypt tank so why not try to keep it that way?!
As far as the E. tenellus... do you know if it grows well in our hard water? Thanks for your compliments on my tank!
Thejoie, I absolutely DO love this light! It's easily one of the best $20 I've spent on planted tank supplies. Highly recommend it!
Thanks again everyone!