regarding the PE sets, I haven't used the WEM set but when I made my Bismarck last year I used the GMM set and it was very nice. It has everything you need. I've heard some good things about the WEM set though.
heres alink to a photo of the GMM set:
http://www.sandlehobbies.com/photoetch/gmm/350/bismarck01.jpg
and go to www.eduard.cz for a pic of their set. Icouldn't find a pic of the WEM set. But go to www.modelwarships.com and you might find some info.
hope this helps.