If you can get TSPP for a decent price, I'd snag that. Great game although it could be a little clunky at times and doesn't have the speed/flow of SW. It is a deep pin and it's works well in a home environment. Looking at your collection, it would balance out your collection well.
You've got a few years to see if SW pans out with each code release and the game should still be available for awhile. It's the approach that I'm taking with this particular pin. Unless a Stern pin (like Aerosmith or Metallica) is decent out of the box, I'd wait things out. SW looks cool but something didn't click right away for me when I had a chance to play it. Maybe future codes will change that. Time will tell...but I don't want to spend my hard earned money waiting to see that happen.