I seldom post here, but I'll throw my 2 cents in. I did a side by side shakedown run between my trusty 60csx and my new Colorado this past weekend. While the Colorado has a lot of nice new features the display was miserable in bright sunlight (at least by my eyes). Even with full backlight on, it was much harder to read than the 60csx with no backlight on. As for accuracy, they were pretty much equal. The 60csx seemed to do a little better under really dense canopies. I think manually entering coordinates is quicker on the 60csx, but that may be because I'm more familiar with the unit.
I really like the Colorado, but I have the feeling that my 60csx is still going to be my primary. My Oregon should arrive tomorrow, so I guess I'll have to do a 3 way comparison this weekend.