Lots of good suggestions here. In all reality you need more females. If it was my collection I would buy as many pastel females as I could get my hands on. Those boys of yours can handle quite a few females each.
I also like the idea of a ghost female, not to expensive and a really nice combo maker. Fires are also a great idea as well as mojaves. So here is my list for you:
0.1 mojave
0.1 fire
0.1 ghost
0.3 pastels
You can make all kinds of cool stuff with that list and if you hatch it and don't really dig it you can trade it for new morphs for your collection.