I have eight and they all serve different roles depending on bit and material size.
Two OF1010's, OF1400, OF2200, two Dewalt 611 trim routers (one is dedicated to inlaying our signature coins), Hitachi M12V (router table), and a Porter Cable laminate trimmer.
I'm not counting the Rotozip or Dremel even though they both have router base attachments.
Actually, two more if you include the ones inside the Porter Cable (Castle) benchtop pocket hole cutter.
My friend, Gary Katz, recommends having one more router than you have router bits!