I have both PMDG 1900s and they are basically just big default King Airs. Default King Air systems and levels of complexity. They're fun, but I'm not sure if that's what you're looking for regarding complexity.

If you like King Airs....get the Aeroworx one (sold through Flight1). I have it and love it. Realistically complex, looks great, and is just...fun!
Last edited by SeanTK on Tue Oct 12, 2010 7:04 pm, edited 1 time in total.