making the switch
 

hey guys im a owner of a 01 powerstroke, and although its been a great truck for me, im in the market for a cr cummins with a 6 speed. my question is what should i be looking for, as in common trouble areas or problems? i would like to get a 06 to 07 but my price range is in the 20 to 22 grand area. any advice would be greatly appreciated!