John, I think that's why the DC is such a great proposition. I do have envious thoughts about the probable higher quality of the DL, and whether I'm losing out in resolution to larger aperture, but as a combination of quality and useability the DC is hard to beat. That's why it is the scope I have used most and will be the one I hold on to as long as I can.
@Gavster, you basically have two lovely scopes which give you slightly different things, the 140 will ultimately give higher resolution views under ideal conditions but you will more easily be able to get the GTX to dark sites under fab skies. A very nice combo to have