Pass Lab X1 and X250 - Which XLR?

I've got a new amp and preamp headed my way as we speak and need help finding decent "starter" balanced interconnects. Due to the $$$ I just laid out, I would like to ease into the world of balanced cables with something good but affordable (under $500/pair?) with the idea of upgrading at a later date.

Speakers are Genesis V - front end to be determined...

Jim