This year I bought both CCr SE and SW Prem, both NIB. 5min down the road my friend has a Rush Prem and I have a ton of games on it.

In a 3 game collection (because you mentioned MBr is leaving), I'd go SW Prem. You need at least one non-fan-layout game and you got that in spades with GZ. So then I'd boil it down to replay-ability. CCr SE is a bit lacking in this department and we won't know what the new code will be like yet (some rumors say it's going to be different but still basic). But if you're going to miss the simplicity of a A-tier WPC fan layout, CCr SE scratches that itch.

Rush is sort of a miss for me. It's fine for what it is, but it's sort of like the band. I like it in smaller doses... thus disqualifying for me it in a 3-game lineup. YMMV.

Meanwhile SW Prem has a great blend of objectives, modes, strategy, and speed. I bought my NIB Prem because I got it for far below MSRP. Otherwise I'd never own this darn game. But in about a week it became one of my favorite Sterns. Sort of like a 3rd flipper mixing things up, the action button and shot multiplier make it unlike anything else I've played. Those who call it "calculus" or whatever, don't know basic math and probably pee their pants when other games get to a 3X playfield. How many games ask you to take your hands off the flippers to move around a Shot-X to a lit shot because it then could be worth up to 40X more??? That's some CRAZY risk/reward unlike any other game I can think of. If you start Video Mode and you have a good multiplier going but forgot to place the multiplier on the Hoth shot, you audibly call yourself the worst thing that comes to mind and laugh at how you just pissed away like 100M points.

Add in the many ways to play the game, the character perks, the speed, the hyperspace loop (biggest rush in pinball trying to get more than 1 up there), the theme, and the fact there's nothing like it, I'd say it's a clear winner out of the 3 options. It's WAY MORE than "just another fan layout" and is great in a small collection.