Very expensive....but I have a Rolex perpetual motion watch from around the 1960s. Very cool, never needs to be wound, and is water resistant and darn near indestructible.
Mine was a gift from an Aunt when I graduated law school - it belonged to my paternal grandmother who passed away literally 30 days before I was born, and she held on to it for me for all this time. I love it
I have a gold oyster perpetual datejust, my father gave me, I wish I could say that I love that watch, but it sits in a box in the gun safe. My father gave it to me because he knows I am a geek and he could never get it to work (as in keep time for more than two days) I could get it to keep within 10 min. each week but by the time I figured out how to develop that "mechanical wrist-shake" habitual I had already switched to the Eco-drive.
I would never suggest the exact model of Eco-drive because of the weight it takes to keep a working depth gage and multiple complications (extra dials and features BTW) - but I would say that with a 20 year battery, more accurate, fewer moving parts, and a reasonable price and weight, I would think the eco-drive watch would be a good choice, at least the non-dive watch versions would be relatively inexpensive and much lighter in weight.
Also, there are the features - what do you want it to do? Years ago you could tell (and still can to some extent) tell what a man's passion was by the type of watch, managers, lawyers, and bankers had rolex, engineers and space/spy techies had Omega, Flying pilots had Breitling, Track and racing had TAG, and the filthy rich had Patek Philippe. Then you have the diving watches like mine pictured earlier and all of the big boys in watch making make at least a few models that are actual diving watches (yes there is an ISO standard for them btw) and they are all heavy (thicker glass, machined cases, mono directional bezel) it's like wearing a rock and you will knock it against everything, I have broken things by accident with my old TAG 2000 and my current Eco-drive, and the Eco-drive is heaver.
The standard eco-drive watches are reasonable Overstock has the simple men's watch for 82 bucks.http://www.overstock.com/Jewelry-Watches/Citizen-Eco-Drive-Mens-Canvas-Strap-Watch/3950637/product.html?cid=123620&fp=F&ci_src=14110944&ci_sku=11986828
Hell Timex and Casio even have solar models available for under 100 bucks (some under 40).
You will not find an inexpensive mechanical Omega, Breitling, or TAG, but they are very nice but do require a "service visit" every few years, the electric watches will not have that problem. As others have stated you could likely get a lifetime supply of inexpensive watches and batteries for the cost of a single mid priced mechanical automatic.
What is so strange is that there are so few movement manufacturers (the factories that make the moving guts of the watches) and many watch brands share the same maker of the internal parts.
Two other things, men are sensitive to style even if they will not admit it, so a cool watch can make a guy/geek happy...
The other thing is body compatibility, I kid you not, there are some people that cannot wear a watch without destroying it. Some humans have such corrosive skin excretions that they will destroy the metals and seals on watches, others just cannot keep from hitting things with them (that would be me), and then others have "problems"