I would get a pastel or fire or other COLOR based morph het pied. To me, spider pieds don't really show off much cool spider traits! they are all white (which is cool!) but they aren't necessarily my top choice when it comes to pied combos. Pumpkin pieds, on the other hand, are amazing and I'd totally want one! That doesn't mean I won't eventually be breeding my spider and piebald, but it's not my first combo! I've heard that morphs with pattern tend to get obliterated by the piebald and become a snake with a neat face and almost all white body. Impressive for genes, but less cool as far as looks go, since you could just buy a high white pied, not as much my fav!
But i say pick a few different het pieds or poss het pied morphs you;d like and see what you can find! Good luck!!