I'm pondering adding a Williams SS machine to my collection. While I'd love to get a Cosmic Gunfight, I know those are a bit hard to come by and fetch a bit more. I also thought about Firepower but I'm thinking about maybe a an Alien Poker or Blackout. Firepower can be a bit too quick and I'm looking for something with a bit longer play times.
I've never played a Blackout but it seems like it would be a fun one with multiple spinners, drops, and the Blackout saucer. I haven't seen them around as much so maybe they're a bit underrated?