So, my company and I have been laser engraving for over 15 years (mainly in the monument industry). Our first laser was a Vytek back in 2000, followed by two smaller GCC machines and an AP lazer machine to replace our old Vytek when it started going out. Now that we've established ourselves, we are thinking about upgrading to a "top of the line" monument laser. Mainly, from what I've researched, this means Kern or Vytek. Because of the customer service and problems we encountered with our Vytek machine, right now we are leaning toward a Kern system. Any advice from anyone with experience with these two types of lasers?