Any EM is going to be bulletproof once adjusted and played regularly. Most are built like tanks; but each has their issues. I like Gottliebs, but dialing in the Ax and Bx relays can be frustrating. Chicago Coin score reels are a PITA to get just perfect so they work. But I'd say anything from Gottlieb, Bally, Williams, Chicago Coin, Stern, Sonic and even Zaccaria would be fine. Games from different manufacturers isn't an issue as they are all about the same in terms of operation.