I'd recommend staying away from Rotala Macaranda.
I have a lot of it in my planted 15 gallon, but its a very difficult plant IMHO.
The stems are very soft/fragile, making it difficult to trim and replant. Also its very sensitive to lighting and water conditions...it struggled and was dying in my tank until I up'd my lighting from 2.6 watts per gallon to 4 watts per gallon.
Lighting aside, it doesn't do well in any type of current at all, as it tends to pull free or break its roots and float away

It does look very very very nice though when it gets going, and mine is growing about .5 inches a day.