Wow they must have a LARGE office or only run text weight uncoated paper for the majority of the prints.
What is their application???? That never gets answered. Are they running text weights or cover weights, coated or uncoated??? There is a HUGE difference in how the machine will perform when you (owner/operator) are running the machine towards it's max gsm on a regular basis, you should know that.
Every buying decision needs to be weighed to the answer of those questions. There is a reason why all the manufactures have so many different machines, they all fit a need or a set of needs. Unless you are talking iGen, Nexpress or Indigo production levels, then you need to be more aware of the machines limitations. For an environment that will predominantly run text weights the c6500 will be a fine solution, but if you are talking about running 12x18 226-300gsm coated day in and day out, I doubt it will run consistently without service being there working on it all the time.