The reason why I was caught between the two was because I like the personalities of bettas and their beautiful finnage and colors. However, what I don't like is that I have never had a betta for more than like four months. On the other hand, I like the fact that guppies (males) are usually colorful and I have kept them alive longer than I had bettas, however, guppies don't have a labrinyth (however you spell it) organ or whatever so they may not be able to tolerate an environment with not a good supply of oxygen and whatever, also, guppies are usually pretty dull anyways. Another thing that is good about the guppies is that they won't hurt the white clouds and are very compatible. Even though my nano is going to be quite planted and there are hiding places in the plants, some bettas are really territorial and some aren't so its really hard to tell. I was thinking though, that since white clouds are really fast they would be able to dodge the betta and hide since bettas are usually slower swimmers and don't have that much stamina. I am still open for any other suggestions. Thanks to those who already posted and who are about to post.