Rare Materials

I was looking over the rare material crafting post
http://www.guildwarsguru.com/forum/s...ad.php?t=10318
and i was wondering, what do i do with these items once ive crafted them. What do i do with spiritwood? Im thinking you take the materials to another crafter to get a weapon made but is it even worth it? The gold weapons that drop seem to be the best so why would i want to waste the money on these "rare" materials?

Is there a list of crafters that use there rare materials and make weapons or armor?