I have a 3000 series in yellow. Because of the aggressive faux military thing, the plasticky feel, the random case protrusions that server no purpose except to make it look "tough", and the glow-in-the-dark appeal, I realized it's an 80s action figure transformed into a watch. And I love it. It's a joy to wear, comfortable enough to totally disappear on the wrist. I'm wearing it now, and I can't feel it at all. The tritium is very useful in my life and feels like magic. I wish I hadn't waited so long to buy one.
Personally I wouldn't think of shelling out for the metal one because a tritium watch is pretty much inherently disposable. Plus, the plastic (carbon fiber reinforced nylon) is super comfy and light, absorbs shocks to protect the movement, and never shows scratches. But to each his own!