Yep, I'm pretty much in the same position. Since getting DCS a few months back I didn't boot up X-Plane once and ended up 'Joseing' it from my hard drive last week. DCS has made it seem just so...unconvincing.
Really enjoying the prop planes, particularly Mustang, in DCS. Airframe responses to stick movements / environmental stimuli like wind just seem so much more plausible than X-Plane.