So we have decided! After a long discussion with the wife, she made some great points. WOZ is out of production, and while there is rumor there will be another run, there is also rumor that the "new" version will be a lesser version with "problem mechanicals" removed. I don't want a stripped down version, I want the full version in the wild today. Even if that turns out not to be true, it's still an unknown on when WOZ will actually be available again.
So - we are buying both a GotG premium and a Star Trek premium. I placed my GotG Premium order with zmeny at Flip N Out, because Zach is awesome and super easy to deal with. And I'm getting the ST Premium through Marco/Stern via the MGC show deal in April. This way, we play both, and if one starts to outshine the other, we can sell one and use that money towards a WOZ.
On that note: for WOZ, we will be buying a WOZ still 100%. But not until we have solid details on when and what is actually available. Worst case I'll buy a 75th or RR the next time they make some of those. I plan to buy that one from Chris at Kingpin who is also awesome. Chris goes out of his way to help his customers, and that is something I can attest to personally!
Thanks to everyone who posted, this honestly was super helpful, even though so much of this is subjective. People also provide some unique points.