You can put an Enchi with almost everything you have and get some nice animals. Enchis seem to be getting more and more popular.

However, I have no idea what morphs will keep their value in the next 2 years. If anything, I would probably go heavy on buying females. Then, after they get up to size, you can always buy the male. Males go a lot cheaper than females, unless you're talking about a new morph.

Good Luck!
Jim Smith