Thanks to you both! I stopped by Cabela's today after work and test drove a few pair. They didn't have the Cascades, but had the two Yosemites and the Mesa. I was pleased at the size of the 8x30 Yosemites, and they were quite sharp (I tried them after I checked three pairs of the Swarovski ELs -- much to the puzzelment of the guy working the counter ("You're going to compare the Swarovskis to THOSE.....?"), until I made HIM try both. Brightness, of course, was way off, but he agreed sharpness was pretty close out to half way from the centers, on the chart at about 50m (near the moose...
). In the end, although I liked the Yosemites, they were just a bit too dim to work as a compliment to the Pentax RPs, I think. I wonder whether there are any nice 8x32 or 8x34 compact porros out there (or very lightweight 8x40/42s).....
Kevin: My mother was trained as an ornithologist in the early 1960s, and has always watched birds for pleasure, although she has never really cared much about "quality" binoculars. I remember from childhood a lot of her field identifications were naked eye (and ears, of course). I remember some old B&Ls, and now the Pentax. Not sure what else she's had. I do know that light and compact are big plusses for her (she's getting old). She still takes a lot of trips to the field, so the 6xs may be a bit underpowered for her.
Side story: I had my ZRS HDs with me (10x42), and although the Swarovskis are better (all three pair I tried: 10x42, 8.5x42 and 8x32), I'd say (if I had to quantify) they were maybe 15% better. Noticeable strengths over the Zens were in the edge-to-edge sharpness and the feel of the focuser (not so heavily damped as the ZRS, but still nice and precise - the diopter adjustment is also nice). Still, the ZRS has a big enough "sweet spot" so that for my uses the loss of edge sharpness isn't a big deal. My conclusion would be the ZRS is 85-90% as good for 15% of the price. Wow. I wish Zen Ray would hurry up with those 8x36s!
EDIT: I should add that the Yosemites were just outside of useable for me w/out my glasses (infinity stop was too short). My mom has 20/20 so no big deal, but these were the fist bins I've tried in a long time that I couldn't focus at a distance (even my favorite glove-compartment $12 Chinese roofs let me focus w/out glasses).