3406e was a GREAT engine, I'm just not a huge fan of these new ACERTS. I know you'll argue with me about that until your face turns blue, but I've asked quite a few guys around here what they get with those engines, and it's not pretty.
I've also heard of 2 guys at my company that had them, and the turbos blew. $8,000 later(2 turbos and the charge air cooler).