Allow me to interject...
When you buy a watch, look at it from an adult perspective (quality, reliability, durability) and from a military perspective (tactical sense). Personally, I don't buy things like watches with the intent of throwing them away. Hence, I don't own a $30 watch.
Here is what I consider when thinking about this:
-Durability (can I bang this against a barracks doorframe as I move frantically without it breaking? Is my buddy going to snap it off my wrist when he grabs my arm to pull me up an obstacle, etc.)
-Wearability (Pool? Lake? Dust environment? Mud? What about when I sweat? Would I be proud to wear this in a dress uniform?)
-Usability (To me, this is most important. You want something you can see in all environments, read quickly without straining, and that will support the tactical basics of noise & light discipline. Nothing makes you look like an ass like giving away your position in an ambush or evasion scenario because your digital watch beeps).
Based on my experience, these are the best watches in terms of value and meeting all the above criteria...
Luminox Navy Seal 3000 Series (I know, I know, Beat Navy). My father got me this watch before Beast. I wore it for 8 years, to include all of West Point, NTC, and 24 months overseas. It was absolutely indispensable in the cockpit in Iraq. The illuminated dots WILL NOT fade over hours as they do on many more expensive watches. It's easy to read in all evironments. Believe it or not, when you're under stress and your hands are full, a naturally illuminated analog dial is a hundred times easier to read than having to push an indiglo button and trying to read a digital watch. Your brain instinctively processes the analog readout faster. No thinking. This watch has the added bonus of offering an optional rubber strap with a super sturdy metal clasp closure instead of a weaker buckle-type closure. About $175 dollars and worth every penny.
Here's how it looks at night. Easy to read, but won't give your position away like that silly indiglo.
If you want to spend more coin and really desire a timer function, the Luminox Dive Chrono is a great choice, too.