37gl is a tad tight for two full grown angels IMO, but technically it's enough room. Just watch them as they mature, if you have two of the same sex, you may get a lot of aggression.
You only have about 1.6wpg from normal output fluorescent, so you won't need much in the way of ferts once the tank is fully stocked and established. In the meantime and if you see deficiencies, you'll want to have sources of phosphate, nitrate, potassium and traces with some iron. Seachem sells it all separately in the Flourish line, or you can get it dry from bestaquariumregulator.com. You might want to frequent the low tech forum for dosing advice, I wouldn't start up a full on dosing regime with that level of light, plants can't take in nutrients that fast until they are driven by high output light. Don't run out and buy a ton of light because I said that, just stop into the low tech forum and figure out what you need to do for ferts.
The new setup and plants are looking good. I would feed the grasses root tabs every few months until you figure out your dosing needs.
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