I finally bit the bullet and ordered a Garmin Forerunner 235. I was interested in the watches that gave heart rate measurements on an ongoing basis (rather than just while recording activities) so that I could see what happens to me when I'm jet lagged.
That basically limited me to the FR 235 or the FR 935 (which has usurped the Fenix). On paper, the FR 935 looked as though it had more analytical stuff that I was interested in, but it's $300 more. The big advantage is that the FR 935 actually has an "always on" heart rate monitor, whereas the FR 235 apparently records measurements "from time to time or when you're doing stuff."
Chris M has a Forerunner 630, which is does some fancy gait analysis, but requires you to pair the watch with a heart rate monitor and thus doesn't do the resting heart rate stuff. So I ruled that out. I'm broken enough to know that my running is lopsided without a watch to tell me so.
Then I did a bit of poking around on various sites. There was a healthy supply of used watches on eBay, which were selling for healthy prices. Amazon was typically slightly more expensive, but without bidding and without returns issues. Refurbished watches on Amazon USA were about $160, compared to $190 on Amazon UK. After adding in California sales taxes, though, I was only looking at saving about $10 by waiting. And I wanted it before I travel so that I can get a baseline to compare against when I'm next Stateside.
It arrives Monday. I'll let you know what I think.