I too have them all (except for the WiKi crown) and love them.
Earlier this week I received the three new helms and truly miss the metal in their production. Here's my opinion of these three:
- "Skully" helm is fantastic, with great weathering. Amazing job, all around.
- "Witch King of Angmar" looks good and can get by, looking like metal, even if it's not.
- "King Dain" helm is my least favorite of the three. Looks exactly like what it's made of: plastic. While the others at least give the illusion that they are made of metal, this one, because it's made to look fairly new and with no weathering, fails to do so. In my opinion, it's the one that suffers the most for not being made of metal.
I'll continue collecting the helm line but it's truly a shame that they've moved away from using metal, as I don't believe that production costs would have been significantly more.