My filter is a Magnum 350 Canister Filter. It works okay but I'm not the hugest fan of it.
Yes more plants are coming! Just a few weeks ago I started the transition from all-fake to all-real.
As for your question about T5HO, I'm no expert on it so the only thing I can say with some certainty is that T5HO uses electricity more efficiently than PC. T5 bulbs are also smaller.