I just finished reading Carrion Hill, and it was fantastic! I cannot wait to run it. Although I am a huge Lovecraft and horror fan.
Modules I would suggest buying: Crown of the Kobold King, River of Darkness, Hollow's Last Hope, Tower of the Last Baron, Hungry are the Dead, Return of the Kobold King (heck that whole mini arc is worth purchasing). Finally Carnival of Tears!
I read both Crypt of the Everflame and Masks of the Living God. Both were entertaining. I plan to run my group through them (including The City of Golden Death when it comes out) as a monster-PC mini-campaign once we finish up our Star Wars Saga Campaign.