1) If you care, neither the Seiko nor Pulsar are made in Japan (the movement is though). Haven't been able to track down the Citizen at a B&M to see it in person, so not sure.
2) From what I'm told, the Citizen EcoDrive is the best constructed (not talking about the movement, but case and band quality). What's VERY interesting to me, is that the Seiko feels extremely janky. The Pulsar is heavier. I went to a Sears that had both (was hoping for all three) and could compare them right next to each other. The Seiko feels more like I would expect a Pulsar to feel, and the Pulsar feels slightly better than what a normal Pulsar feels like to me. Neither feel as good as I think a Seiko should feel. The dial on the Seiko looks better quality, but I prefer the hands (and that they are black) on the Pulsar.
Have you considered a basic Seiko automatic model? Those generally feel more substantial (the appearance of longer lasting).
On the Wenger, again if it matters, the case is probably made in China and the whole watch feels kind of light (check it out). At lease Seiko/Pulsar indicates that their watch isn't really made in Japan, whereas Wenger alludes to being "Swiss Made".
Regardless, all of them are pretty good quality watches (the Pulsar is pretty darn good for the $50 they wanted at Sears) and you'd probably have them a long time with little maintenance.