I want a bike that does it all.
Unfortunately there is no such thing. You probably need to decide how off-road you want to go. If you get one that will do well for the off
-road, it won't be very efficient on
the road. Unfortunately a hybrid is kind of a compromise, and as such, doesn't do really well in any
area. Road bikes (especially touring ones that allow for tires a little bigger than 25mm width) can handle hard-packed dirt roads just fine, but not going over big rocks, roots, etc..
What was there about the Jamis that made you feel insecure? How tall are you? Surly is definitely popular in touring circles, and for good reason. Also, their smaller frames are made for 26" wheels which is good for shorter people. Making a bike with 700c wheels to fit really short people requires
compromising the geometry, resulting in poor handling. There is no way around it. The fit may be perfect, but the rider won't have the control of the bike that (s)he otherwise could. One common tell-tale sign is the weaving, the difficulty in making the bike go really straight as you pedal.
I haven't ridden in the Rockies much, but I understand the steepness of the grades is mostly held down to about 6% because they don't want vehicles sliding off the road in the ice. California has plenty of back roads with grades of 10-20% where ice is not a problem, but the main roads again hold it down to about 6%.
In any case, get a mirror (glasses ones work best) and learn to use it. It's not just to see things coming for the advance warning, but rather that you can learn to get a surprising amount of control
of the traffic behind if you have one. Drivers seem to appreciate and respect that we can see behind also. Knowing the best way to avoid or evade a situation developing ahead
also depends on seeing what's behind