I can't say much for the 920, I looked at one in the store and didn't quite like it... I do own an AWOL and Vaya so I can speak for them. I really like the AWOL a lot. When I originally purchased the AWOL I was torn between it and the Vaya but in the end opted for the AWOL. I always felt a nudge of remorse with regard to the Vaya so when I saw a 2013 Vaya 2 on CL for a good price n+1 rationalizing kic ked in full gear and I jumped on it. After a summer of riding both I know for myself that the AWOL would win out between the two. To be fair I purchased the AWOL frameset and built it exactly how I wanted so that might help push the AWOL to the front but I'm not sure. I also feel the AWOL would handle loads better than the Vaya but have honestly never done anything more than a long weekend on either. I also have a Randonee that I've been taking on Longer trips but only because my daughter stole my AWOL after I let her ride it. I guess that might count as another vote for the AWOL...

Another bike to look at if you're stuck on disks is the Novara Mazama, frame looks very similar to the Randonee. The Salsa Marrakesh looks pretty nice as well but I don't like the idea of being tied to the alternator racks though. There's always the disc trucker too which is very highly regarded as well.

My advice would be to try them all out for yourself to find what you like best...

That's kind of funny but don't you feel that Surly/Salsa could fit that bill as well?