The way I see it, you're going to med school to be a physician, not a med student. Having less debt will increase the likelihood that you'll be able to be the kind of physician you want to be. Med school is more a means to an end than an end in itself, in my opinion, so if I were you I'd choose your state school.
Many things about med school are uncertain; it's hard to say where you would really be happier and ultimately impossible to know for sure. The difference in cost of attendance, however, is certain, tangible, and significant.
It's hard to give up a dream, especially when its realization has embedded itself in your identity. My suggestion is to think of all the new dreams you might have if you weren't burdened by such astronomical debt as attending OHSU would impose. I don't know you, so I don't know what they might be, but if it were me (and I have made a similar decision, albeit easier in many ways), reduced debt would mean my wife could go back to school as soon as she wants, and we would possibly even be able to start saving money for my son's college.
Rationally, I think the choice is pretty obvious: go with the cheaper option. Personally, I struggled with the emotional components of the decision. I overcame that by focusing on what I would be gaining rather than what I might be losing.
Good luck!