The RXM looks nice, and is the best looking bike of the bunch IMO. I second the no 1 x 11 idea if you have major hills. Double chainring all the way. I'm considering 1 x 11, but I'm in Chicago where the only hill I ever see is an occasional highway overpass.

I've only ridden a CX bike once, but I really, really liked it. Local bike shop had a Kona Jake on sale that I nearly snatched up...assuming all CX geometry is relatively similar, yes it would be very very comfortable on longer rides. Much more so than a standard road bike.

I'm assuming I don't need to say it, but do switch out the tires whatever direction you go, assuming you commute on roads.

edit: I just noticed your last comment. A CX bike with road tires IS a steel touring bike with discs, for all practical purposes.