Have any of you played your KN6000 much longer than that without any problems that needed to be repaired?

Hi Larry. If it's any comfort to you I had my 6000 just short of 3 years - bought one of the first batch. Never any problems and as for time spent on it, I dread to think - I probably averaged a couple of hours every day plus 2 or 3 gigs per week lasting between 2 and 4 hours.
I just hope my 7000 will be as reliable.
John
BTW Don't let the 6000's reliability be an excuse for not changing to the 7000 - Believe me it's great