Hey Coy, I remember telling you today at the store that I would give you a view of a awesome Discus Tank with Swords (I know you are not fond of them, frankly neither am I) but for the 150 they would make great background or even if you keep them trimmed mid-ground plant. Since you are looking for a cascading look I do not see much placement for such a plant but here is the link for some other ideas you can work with.
Keep in mind Discus do enjoy having an open sandy substrate so that they can forage for food at their leisure. Though it is not necessary, it is recommended my many to give them some open area's to scrounge around in.
http://showcase.aquatic-gardeners.org/2004.cgi?&Scale=514&op=showcase&category=0&vol=3&id=141
Keep in mind Discus do enjoy having an open sandy substrate so that they can forage for food at their leisure. Though it is not necessary, it is recommended my many to give them some open area's to scrounge around in.
http://showcase.aquatic-gardeners.org/2004.cgi?&Scale=514&op=showcase&category=0&vol=3&id=141