Years back I used my airplane headset (non-ENC) all through rotorcraft training without too much difficulty. Eventually after training went with a David Clark H10-56 ENC model and enjoyed quieter flights however. Now I use the David Clarks the company installed in the heli... If you already own a headset of quality there shouldn't be any noticeable difference in using an adapter. The longer cable you can coil up and wrap with a little black electrician's tape. It looks MacGyver-ed, you don't want to show it to your favorite date, but it'll do the job.
Good luck