Just ordered a pair of Westone ES5. One thing nice about the Westones is how good they are supposed to be at low levels.
I was persuaded by blog comments on head-fi.org and this review sealed the deal:
https://www.editorsguild.com/FromThe...TheGuildid=176
Custom fit IEMs (25dB ANR) with over-the-ear protection (29db NRR) should provide good isolation for in-the-room mixing.
I went with these Peltor muffs:
http://www.amazon.com/Peltor-H10A-Op...3126642&sr=8-1