Eduard is excellent, and so is WEM. If you can, get both because each have some different parts. I also recommend the OTHER WEM set, Vents & Floods - I am somewhat biased, Dougie Martindale and I created it and sold to WEM last year. But have a look:
http://www.rokket.biz/models/modelsweb/rokket/u557/ubrass.shtml
and a finished model with Eduard, WEM, WEM< and Modlebrass and a lot of scratch:
http://www.rokket.biz/models/modelsweb/rokket/u557/finished.shtml
AMP - Accurate Model Parts
Fabric Flags, AM Uboat Goodies & More
http://amp.rokket.biz/