I've always been pretty much happy with my gear. Played the 2000 forever, then went to the 3000 because of the added styles and improved sounds. It was a real workhorse of a keyboard and never failed me, though back then I always purchased a spare. The 3000 spare was never used on the job in a decade of use. When I purchased the S-950, I did so for a number of reasons, mainly because of the onboard USB recorder, and an increased number of onboard voices and styles, all of which really sound great.
People keep asking when I am going to upgrade to a SX-900 or a Genos, which will not happen - just not enough difference, IMO, and I would have to learn another OS, which is out of the question.
The S-950 served me very well on the road for lots of years, I recorded many of my performances on it, mainly so I could critique them and make improvements if necessary. Now, I mainly turn on the keyboard so I can assist others who are having problems. By downloading their registrations, OTS, styles, etc, and loading them into my keyboard I can usually assess the problem, fix it, then email the corrections back to them. I've done this hundreds of times over the past three years.
Mel, I agree with you 100% - I'm very happy with what I have.
Gary