Your selection is good- I would advise against D.filiformis as it's temperate and needs a bit of extra fussing about- easier to grow that species outside year-round and let it do the work for you.
The plants you listed for possible ordering should be excellent choices for what you are looking for
Another easy, nice looking one is D.madagascariensis, if one is available you would probably have success with that.
D.adelae is dead-easy, as is D.aliciae. as mentioned above
Keep us posted!