I got one at Lowes just like you asked, a steel 5'er for about $400 w/screens. Installed it has been good. Not outstanding but you get what you pay for. Not sure but I think they were dropping the 5'er. Special ordered was about $150 more.
Do you mean French as in "both doors open" or "on door opens on a hinge" ? (BTW - we call them "Freedom doors" now, or at least "Indefinite military stay going downhill and reversing ourselves and asking the French and Soviets for help at the UN" doors)
I looked around recently. The doors at Lowes were crap, IMHO.
Home Depot carries the Masonite line and Atrium line in a "one opens" type of Freedom door. "Both open" are a special order. Since they don't buy those in bulk, you pay about $200 more for a SO.
The Masonite door they _stock_ is steel, matches the Stanley steel line well. About $500, AFAIR. Nice door, well made for the price. The only reason that I might (personally) avoid it is that it has a "rot resistant" wood frame and I think I need "rot proof" in my app. Masonite also makes a fiberglass with a full vinyl frame... about $200 more since it's special order.
The Atrium folks apparently lost their reputation a few years ago but are attempting a comeback. Their door appears to be very well made and solid. Aluminum clad outer, wood interior. Heavy, well made. Closes solidly, almost to tight a seal. About $800, again, AFAIR.
Be sure to price the hardware, screens, and grills if you need them. Also be aware that screens are an issue with a "both open" arrangement.
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