Reading a couple of threads and other forums / articles, seems that many consider radiant floor to be a tricky combo with Geo. My wife would like warm floors, which will all be hardwood. - Does this require a Gypcrete pour? I need a nail base for the hardwood, so this really starts adding a lot of height / mass above the floor tubing. Seems reaction time would be slow. - AC would seem to best use forced air. - Basement will have open stairway down, and be 1/2 finished. No radiant heat down there, I suppose, so ducts needed down there, I imagine. I would think forced air would be the easier solution, but before I abandon the wife's thought of radiant, I thought I would ask. Thanks!