You could always go with one of the all purpose bikes like the Specialized AWOL, Salsa Vaya/Fargo, Cross Check, etc. Not really a CX bike, but more of a gravel/adventure bike. They offer the best of both worlds in my opinion. If I could only have one bike, it would be my Salsa Vaya. I have a set of 700X32 "slicks" for everyday riding and a set of 700X42 all terrains for gravel/dirt road riding. Not to mention it makes a pretty nice weekend touring bike with all the rack mounts. I ride it more than my road or my mountain bike combined.

I will say that if I were buying today, I would go with the AWOL. It seems to be a nice mix between the Vaya and the Fargo. Runs a little fatter tires than the Vaya, but still has more of a road bike feel than the Fargo.