so far my fav. are Ludwigia inclinata var. verticillata 'Pantanal' (red plant in the pic) and
limnophilia aromatica (green plant in the pic)
pic from my tank:
I really love pantanal too. It is by far the most vibrant colored plant that I have kept. When its happy the peach/pink tops are truly something to behold while swaying gently in the flow.
Your aromatica looks like the green variety. I actually statred a tread a while back over at APC about what seemed to be two different types of it I had in my tank. One got nice coloration but the other would only lighten its green in the exacts same conditions/tank. LMK if you want me to PM you a link to the thread.