Who am I to tell anyone not to buy a US Spector? They are amazing.
But, before I dropped that much coin on a bass like that, I would ask myself what it is that i want from a US Spector that I can't get from a CR-made Spector. Even if it is something seemingly superficial, like more/better figuring in the body wood, that's ok if that has a value to you that is worth the premium price. I wouldn't get a US Spector just to get a US Spector, I would need a reason that went beyond what is offered in the Czech basses. Assuming you know exactly what you're looking for, I would say do it if you aren't overly attached to any of the basses you are planning to move.