Well I have them all and for the most part think they're great.
Frodo's likeness is pretty poor and Sam's isn't the greatest either but you can pick those two up for pretty cheap on the bay so I still think they're worth having in your collection. Just leave Frodo's helmet on.
Elrond's likeness is decent but not great and his pose isn't anything exciting.
Aside from those 3 I'd say the rest are must haves. Saruman, Gandalf and the Balrog in particular.
While my pics aren't up to P1X4R's quality here are a few shots of mine: