Russ, I used T5s on my tank with those dimensions--which I thought was a great idea!--and ended up frying some of my plants--especially the frogbit on top. :-/ It was actually too much light, despite looking gorgeous, and I've gone back to trying a single T8 daylight tube. My sorority isn't nearly as pretty as it was under the T5, though.
I have had no luck with Dwarf Hairgrass or Dwarf Baby Tears. In particular, the Dwarf Baby Tears I got died quickly in a variety of my NPTs. I intend to try Glossostigma
next and have really high hopes for the latter.