The advice to wear earplugs under your 13.4's is good - uncomfortable, but good. It'll save your hearing in the long run. I wore 13.4 for about 2500 hours in the Bzatch, sometime with ear plugs, sometime without. Problem is, Disney radio just doesn't sound the same with those plugs in. Also, it's kind of hard to keep up with all voices trying to talk to you at once (ATC, your partner, the other pilots on company freq who always want to tell you a joke when you're on short final, etc.)
If I went back and did it all over, I'd spring for the ANRs. I got to borrow a few here and there over the those years in the 1900 and was hugely impressed with the "comfort" you get without having to turn the speaker volume in your set up all the way.
Even got to wear the Bose set one day, and even though they're WAY too expensive, they almost seemed worth the $950.
Good Luck.