Well then what I am telling you is stay above 48F. Or look into getting some desiccant packs.
I could I could go with some kind of case mod for this - I have acrylic laying around. I could build a box that's big enough to fit my tech station (drives/psu would be outside the box) and have two hole on either end, one with the AC air being piped in, the other with a fan pulling the air out.
If I refilled the case with desiccant packs every now and then, would there still be a condensation problem if I went below 48F?
Edit: If I just stuck with the closet - what happens below 48F? I thought condensation what relative, not absolute.