I just bought some 13.4s too - I am very pleased with them and wear them for up to 6 hours a day without any real discomfort. They are a bit tight though so you might need to modify them.
I have heard poor reports of the ANR Dave Clark headsets. I tried the Bose ANR headset for a sector recently and I didn't like it - it just felt unnatural but I am sure you get used to it.