Unless you are a big MET fan - I'd pass on Metallica. I got bored with my premium and sold it.
Two classic games that you can buy at a good price and have the money left over to add a 3d translite are Medieval Madness Remake (or a nice original) - great machine - there is a reason why it was remade.
Not my favorite but still a very fun game is Attack from Mars remake. Finally - if you have not played it - I would highly recommend checking out Lexy Lightspeed escape from earth - easily the most technologically advanced machine built to date.
Finally my vote for the highest quality of build and second most technologically advanced games are any of the Jersey Jacks games. Beautiful machines, extremely well constructed, reputable company and innovative designs.
In the end - my #1 vote goes for a MMR with a 3d translight from PPS and a nice shaker motor. There's a reason why MM has been the #1 machine for so long!
Whatever you buy - get something you enjoy playing!