Now that I know I can get away with a M20K that will meet the family requirements, I've begun researching them. Due to price point, I've been focusing most of my research on the M20K 231 models. There are several differences that I've noticed and wanted to get some feedback from everyone here. The forum's search tool has provided a lot of great information, in particular this thread: I have a few specific areas I'd like to focus on: Engine: The original 231 came with the TSIO-360