Is a Giant TCX W wrong for me if I want to use it for around town and occasional long rides?
Correct me if I'm wrong, but it seems that cyclocross bikes are basically road bikes with a bit of knobby on the tire. I recently purchased a Raleigh Roper to use as a daily commuter. I went with the cyclocross style because the slight knobby lets me leave the hard-pack every once in a while. Also, there are numerous bosses to mount a rack, bottle cage, pump, etc. If you're looking at graduating to the Cycle Oregon week ride, you can always get a road/touring set of wheels to swap out. Or, the cheaper alternative is to just get a set of road tires to swap onto your wheels when you want to tackle the longer 100% pavement routes.

Also, as @Batman mentioned, the most important thing is bike fit. I test rode a number of bikes at my local shops before settling on the Roper. Some bikes with the exact same setup felt slower and cumbersome while others felt twitchy and uncontrollable. It all comes down to what fits you and your style best. Everything else can be upgraded.