Quoted from pinballaddicted:

Tough choice. If you are going to buy new, I would buy Metallica PremiumLE while you still can. It is a fantastic game and will definitely hold its value. Metallica has a longer ball time than GB so they go good together. We have both. SWLE is still an unknown and will be available for the next few years so there is plenty of time to decide... unless you have been bitten by the "LE" bug. Spider man VE has been around for a while so should be available for a little while yet.
Tough choice great options. Correct answer is to play them all first and see which one you like best. Great hobby. There is never a wrong decision in pinball!

Quoted from Rasavage:

What do you own right now? I think that's something that has to factor into your decision, because you have 2 Ritchie pins on your list already and if you own Star Trek or something similar then I'd say go for MET just for variety.
If you don't already have a Ritchie pin (or something similar) then I'd say go for SWLE, simply because the window is closing if it hasn't already. SMv is great, but pinball addicted is right, it will probably be available for awhile. MET is awesome as well, particularly if you are a fan of the band, but it doesn't seem like there's any shortage of them out there among distributors or the secondary market.
Whatever you decide, you can't go wrong with any of those title. Good luck.