Adirondack, I also considered getting the nifty Casio MilShock from CountyComm -- before I decided it probably wasn't worth the big price premium over the standard Casio 5600 model.
While the MilShock version's nylon band is neat, going the Band-Adapter-plus-replacement-Zulu-Band route makes this already pretty thick watch even thicker -- and bulkier/more prone to catching on stuff.
I think the MilShock sold for somewhere around $90-$100. However, you can buy the standard Casio 5600 for about $35 at online discounters like WatchZone.
This design is time-tested (almost 20 yrs. old) and bullet-proof rugged.
If you carefully watch the various cop/reality TV shows and hi-speed SpecWar (SEALs, Rangers, etc.) operator stuff on the Military Channel, you'll invariably spot a Casio 5600 -- the basic model with the black plastic band -- on many wrists.
Why? It works. It's reliable. It's neat. And it's cheap.
I've also discovered that this watch definitely Makes A Statement. Assuming you have any genuine (vs. Wannabe) "presence," it tends to mark you as a no-bull, violence-prone eeevil warrior type (Eeeuuuwww!!)... especially when you mingle with culturally-sensitive (*cough*) chardonnay-sipping Sheeple at their rallies to turn the whole world into one big wussified Weapons-Free Zone. (On the other hand, that can be great political sport.) On occasion, I've particularly enjoyed the reactions I get when I wear my Casio 5600 on one wrist... and my Omega Seamaster (with custom gold band) on the other.
YMMV.