To me the Mausers are getting less attractive as donors. Now that McMillian is basically out of the game (flattops only, as you said), the stock options are limited and more expensive, at least until Bansner gets their molds up and running. The bottom metal options are limited (and heavy). It's $300-ish (with shipping/installation) to get a safety that works like a model 70 safety. The only easily available aftermarket triggers are timneys etc, meaning no more M-70 open trigger (if you care about that).
...At least this is where I've landed in the past few months. I would vote Winchester.
