Oh, the more the better, that's what I always say! If you can afford it, go for that 3rd one. You will surely find a use for it later on, if you don't decide to use that for breeding as well... Good luck, and keep us updated!
Daveo, I'm not trying to be nit-picky, but just to let you know, it's angelfish...you said in another post you had trouble finding stuff on google about the angels...it may have been because you spelled it wrong. Again...I'm not trying to be a pain about spelling, just wanted to let you know. I'm raising angels to breed as well, keep us updated on how it goes.