Having tried DC X-11 and Bose, the Zulus were my choice. Battery life very good and I fly (instructing) in Arrows etc 5 days a week. They operate fine on rechargeables. I fly other aircraft as well and no compatability probs (unlike the X-11).
Main advantage over the Bose is comfort and strength - the ear cups are larger and envelop your ears whereas the Bose tends to squash your ears. Imo they are more sturdy.
No regrets at all and they are cheaper