I am with you on having a less expensive watch for the field! I can't tell you how many semi-expensive watches I beat to death in the Army! I also have a St. Moritz "Zero" model on a nylon strap. They are ok timpieces. One thing to keep in mind about watches, some that offer "Swiss movements" and all that are good watches however, some of those Swiss movements are not that expensive. What I mean by that is, there are loads of $200 and up watches that have $30-$70 movements, usually ETA Swiss movements. They are good movements for sure, but why pay $400 for a watch that really could be priced at $150? Always do some research on potentially expensive purchases! I learned the hard way over the years!
Even the new Omega Seamaster Pro that sells for close to $2K retail only has a modified $300 movement in it.
Anyways, I think your field watch choices are good ones!
Cheers!