Ok I just purchased the PMDG 737NG and wanted to add FS2crew to it but I see there are SO many different versions. Which version has the most to offer and would be the best to add on?

Hi,You'll want the PMDG 737 version of FS2Crew as it's custom designed to work the PMDG 737.There are two versions of the PMDG version: One for people who own the version that includes the 800/900 and one for people who only own the base 600/700 version.If you require further assistance, feel free to ask.Cheers,Bryan