Joe has the right idea.
All of my pythons I've bought for one of two reasons: 1) I think that particular morph is beautiful or 2) a combo I can make with said python is beautiful. And then I went out and tried to get the prettiest examples of each morph I wanted. Yes, beauty is in the eye of the beholder, but I don't care if someone else thinks my snake is ugly.
So my recommendation is to get a morph and/or combo you like (preferably females, since you're male-heavy) and get the best/prettiest example you can find. However, if you want a specific example, with the snakes you already have, I'd definitely go with a nice Pewter, if you like those.