Although I like my 2004 GS500F a lot, I was surprised how comfortable the Ninja 650R felt when I sat on it for the first time over this past weekend. It actually feels like you sit up straighter than I do on my GS500F. Right beside the Ninja at the dealer was the Er-6n, and there really wasn’t much difference between it and the Ninja as far as how the ergonomics felt. I was quite surprised at that. However, I have read an article on the Ninja 650 in Cycle World a few months ago where their only big complaint about the bike was that the seat itself was not comfortable for a long ride. Depends on what your average time in the saddle would be I guess.