If it were me, I'd focus on getting a high-quality table (e.g. Tornado coin-op, Bonzini, Warrior) whether it has 1 or 3 goalies. The Tornado has 3 goalies, typically, but 1-goalie conversion kits exist. If you do end up with a high-quality, 3-goalie table, I'd play on it a while before investing in a conversion kit. You may discover that the three-goalie setup is a non-issue.