Only one I personally don't have much interest in is the Tantive. Sure, it'd look great sitting on a desk, but I play very little epic (sadly) and when it comes to regular gameplay it's easily the one that gives you the least, especially with C-3PO now being readily available as a promo card. R2 crew is solid, Han crew is amusing, Leia crew is painfully overpriced, but that's all you're getting if Epic isn't something you're going to get a lot of time with.
So if you like Rebels, go with the GR-75. Get all kinds of nice Astromechs, some solid X-Wing pilots (Porkins!), and a new X-Wing itself to boot. And heck, I think it's a beautiful ship.
Imperial side... that is a much, much harder choice. They're both fantastic (both in power and beauty) ships in their own right, and both come with a ridiculous amount of wonderful stuff to be used outside of Epic play. I'd say the Raider probably wins out simply because of what it'll do for your TIE Advanceds and gives you Palpatine. With that said, I was literally scrambling to find a way to justify throwing down even more X-Wing money for my Gozanti. As a fan of Rebels I really wanted Kallus, and I found all of the new TIE Pilots (except Youngster) to be exciting enough that I wanted to play with em' on my table.


