I bought an '05 kona garbonzo stinky from the base of the trestle bike park in colorado. obviously a rented frame will be well ridden. I have now ridden the frame for about 5 years pretty roughly and It has held up very well. I am now searching for a new frame and front fork but only for the purpose of upgrading. I loved my kona and it held up amazingly. I would guess that I could continue riding the frame for many more years but similar to you I am hoping to upgrade my technology.