In the wet, there's nothing else that brakes quite as nicely as disc brakes. Presently, disc brakes pretty much restrict you to cyclocross bikes, which is fine, since many cyclocross bikes also make for decent commuters.

I'd look first at the Trek Crossrip. Two Crossrip models have both disc brakes and fall within your budget, the Crossrip Comp at $1100, and the Crossrip Elite at $1270.

The technical differences between then are mainly of the "how many angels can dance on the head of a pin" variety. The practical difference is the paint. Matte finishes such as found on the Comp, while trendy, are difficult to clean and to keep clean. In my short stint at an LBS, I learned that the only thing that really cleans matte finishes well is a Mr Clean Magic Stain Eraser. Cleaning sprays or plain soap and water doesn't work.

I own the forerunner of the Crossrip, a 2006 Trek Portland. After some initial teething problems (that are not present in either later Portlands or the Crossrip) it's been a very satisfying daily ride in all four seasons and in all weather conditions. Although I have two other bikes, (and others have come and gone in the intervening years) the Portland remains the one bike I'd keep if I could own only one.

If you prefer straight bars to drop bars, have a look at the Trek FX 7.4 disc. At $880, it'll leave a lot of your budget available for accessories. The price difference between the FX series and the Crossrip series is mainly due to the difference in price between MTB and road shifters and drivetrains. It's a personal preferance choice between them. Either will be just fine.

If you prefer MTB style bikes, you'll need recommendations from someone else. I'm also not well-versed in touring bikes with disc brakes, although there are a few from what I hear.