Randy: I don't disagree with anything you've said. (I think the DOF issue with the Stylus is a bit more than simple DOF, though; I seem to recall that its auto-focus function sometimes compounds the issue. But that's a different story, and subject to the vagaries of my memory.)
But the first post said nothing about an agenda other than a "camera to use while skiing" ... and now it's (also) about showing how inexpensive RFs can equal a 20D/Tamron combination in terms of image quality. That certainly livens things up! 😀
Given this "new" information, I'd say go for the SP if at all possible, then the XA, then the Stylus.
Shutterfiend: Yes, the selenium cells have a finite life. The life is extended by keeping the selenium cell out of light (dark storage) when not in use. So if you get a Trip with a working selenium cell, you're good to go ... for as long as the cell is "alive". My thinking was simply with regard to the temperatures you might encouter. When the batteries on other cameras poop out because of low temps, the Trip will shoot away. With the XA, low batteries mean it's not operable at all; it is totally battery dependent. With the SP, you miss the metering but can shoot on manual. With the Trip, you still have metering AND shooting.
Oh hell, just buy an OM-1 and the 40mm pancake. 😀 Hardly larger than the SP...