Headphones for Hearing Aids

Hi, I wear behind the ear hearing devices and have been having challenges with my Senns 650s. I enjoy the sound, as well as the senns 600s. My problem is that they clamp so tight I'm getting a high amount of feedback and the aids themselves constantly adjusting to accommodate the sounds. How are you in similar circumstances dealing with similar issues? I had read in another thread about akg h701/2 that don't clamp against the ear seem to work well. Would like to continue with the Senns and looking for possible solutions, or alternative phones with a somewhat similar sound signature, $400 max. Also do on the ear phones have the same issues?Changing the hearing devices are not a possibility. Any advice would be greatly appreciated. Thanks, Dave