It was rather easy for me to make this decision (just need the $$ part now, lol) because I know what I want to produce. I love black widows, BELs, and kingpins. So I'll get a male Queen Bee along with 3 females - black pastel, lesser, and pinstripe - and go from there.
I also think that citrus pewter fader would be awesome.... With what you have, I'd look at that citrus pastel idea plus maybe a female axanthic or het. A male lesser would also pair nicely with your pastel het pied or that possible citrus pastel in the future too. Just a thought!