I had the AKG K44s that lasted me less than a year, and were horridly uncomfortable. K77s same thing. One of the guys i jam with has a set of K240s that lost their connection too. They all seem to fail right where the 3.5mm connector and cable meet, the wire breaks. The K44s and K77s were hideously uncomfortable on me, although I have used my friends K240s and when they work, they work nicely. My K77s hit the trash as they were THAT uncomfortable, the K44s got a replacement plug and have been working fine since, but they hurt my hears after about 15 minutes of use.
I wish my experience with AKG was as positive as yours, lots of folks report great results with them, I cannot report the same, wish I could...