Millworkman - the brand is Plastpro I believe. I purchased from Ganahl Lumber. Ganahl gave me a catalog of Emtek door handles, but I don't know if I'm limited to those or if they can just bore holes for whatever door handles I choose.

For good weather seal and security it is best to use French doors where one locks to the other with pins by pulling up on the lever handle of the operable leaf. Matching such a handle may be difficult.

Our French doors (Pella) came with levers and locks like JDS is describing. The concept is in your second link. Our doors lock when the lever is raised, with pins going in at top, bottom and between the doors. A one-point lock between a pair of doors isn't hard to force. (A former neighbor's home was broken into by someone who just forced the doors apart.)

Get french doors with a keyed (inside and outside) deadbolt. Hang the key up somewhere in the room that can't be reached by someone busting through a window and grabbing it. Handle locks or locks that are key outside/turn lever inside can be unlocked by busting the window (if you have multi pane doors, like I do). This is what we were told by our inspector when we bought this house.

Sounds like what you have is not really French Doors but a steel door that has been hung as a double door. The hardware you will need is basically the same as any entrance door. The gentleman above are speaking of a true french door with either multi-point locks or at the very least flush bolts in the inactive leaf and it doesn't sound to me like that is what you have.

Plastpro doors are fiberglass with composite stiles and rails. I think you might be right that they are simply paired doors so one would have flush bolts top and bottom and the other would have a locking hardware set. This is not good for security or weather tightness but maybe the OP lives in a very safe warm place.

Take a look at Andersen French doors for a comparison.

Thank you all for your help! You're correct that the doors are fiberglass. I called our salesman at Ganahl this morning and he said we can't do multipoint locks on these doors and there was some other option that we would have had to select at the time of purchase but can't be added now. Wish I had researched this better and/or asked better questions at the time we ordered the doors, since they are now non-returnable. Hopefully it works out.

I bought the keyed door lever and deadbolt (single cylinder - see below) for the active door and two dummy door handles for the passive door. Re double cylinder, the Ganahl salesman said the downside of that, aside from inconvenience, is that in the event of a fire or other emergency, it slows down your ability to exit the house quickly. If someone is determined to break into the house, the double cylinder may create an extra step but they'll find another way in.

And P.S. I do live in a warm and safe area, although it's an El Niño year, so good luck to us and our new doors!

Thank you all again!!