Good list. I'm mostly stopping in to say welcome back, B!
I still have use and like OCM R44 as well as DR680, but I think SD or Zoom is probably the right answer for you. I mostly use a first gen Zoom F8 myself and really like that machine. Well built, great preamps, great reliability, no problem with generic SD cards, easy interface. I've never had to repair any of my recorders so things like layout, ease of use, full size XLRs for each input channel, and cost-benefit make the Zoom F series very attractive to me.
Take a look at an F3. For 2 channels its seems to be the sweet spot and is likely all you need. Cheap, simple, reliable, small, sounds good.
The 32 bit floating point recording feature of the new Zoom's and SD's isn't important to me, but is valued by other TS members. Consider that sort of a separate issue to look into. I prefer recording straight 24/48 WAVs for a few reasons - 24-bit offers more than sufficient dynamic range for me, the resulting files are smaller, and are straight raw WAVs which result are playable by anything, prior to doing any post conversion and normalizing.