The field watch has recently been experiencing a similar resurgance to that of the 1970's/80's as it finds itself very much at the center of the menswear heritage/workwear movement. Guys who would typically pass over such a watch in favor of something more intricate and expensive are drawn to the field watch's simple aesthetics and rich history. Outdoors companies like L.L. Bean and Orvis are offering the same field watches they have for years, while brands like Timex (in a "collaboration" with J. Crew) are re-releasing models from their past.
If you're in the market for a cool, new watch and don't want to spend north of a king's ransom look into a field watch. I recommend going the vintage route by picking up one of the hundreds available on eBay. You can find plenty of working watches (sans band if you like) at a bargain of the new asking price. Thanks to a tip from Nick, I am currently trying to secure a vintage L.L. Bean field watch as we speak (you're crazy if you think I'm going to link it up here, though hopefully I can post on it when I win the auction). If you're worried a vintage option is too much of a risk, try any one of the new varieties posted below.
I'm really into black face (wow, this can definitely be taken out of context) watches in general, so that's what I would recommend as far as faces are concerned. Otherwise, there's not much else going on outside of the band you choose. The field watch is a complete "less is more" piece and that's the way a watch should be. No matter if it's a field watch or a Cartier tank watch, the simpler the better. On the matter of bands, most of these allow you to switch in and out the band of your choosing. Grosgrain seems to be what's trending right now so either head down that route, or go in the opposite direction. For someone looking to break new ground, try a simple cotton (waxed even) band or some type of nylon (braided possibly) to keep with the understated theme of the watch's face. Or you could just say "screw it" and throw on a vintage leather band. I can't imagine anything cooler right now than a "blacked-out" field watch. Who watches the watch men? I do, that's who...
L.L. Bean Classic Field Watch...$89
Orvis Briar Haven Field Watch...$69
Timex Expedition Retro Metal Field Watch...$39.59
J. Crew x Timex Military Watch...$150.00
Hamilton Men's Khaki Field Watch...$116.99
*Field watch lead in pictures and history paraphrased and sourced from here.