People put a lot more emphasis on rdps gearing than is needed. You should not be sacrifising 4k dps to get another 60-100 spellpower from spirit. Also, if you're pugging you aren't going to last very long with pure rdps gearing. I'm gearing for affliction, so don't armory me to see what to do for meta, but you should not forsake all other stats for spellpower/spirit like some meta locks I know. But yeah, people are right about the belt/chest and such. I haven't looked at meta stuff in a few months but I believe Sanguine robes are still BIS.