warlocks and tailoring

What is generally the best type of tailoring to pick for a warlock? As in, what would be most beneficial for me? I'm unsure what to pick out of spellfire/mooncloth/shadoweave. Any ideas?

Well I'd pick the one that

Well I'd pick the one that is going to make the most gold because at this point you can buy cloth easily off of the auction house and if you make the ones that sell the best you'll have plenty of gold to buy the ones you need.