F90x was a good camera, I loved the way they improved matrix metering and faster autofocus, but that was 10 years ago.
The camera itself felt solid, nice handling, even though it took a while to get used to after switching from a Pentax Spotty.
All the Nikkor-D lenses are excellent, and also I used some Tokinas ATX with it.

Can't comment of the Canon EOS though.