Had the same "problem" before starting my PPL. My seasoned instructor gave a simple and most helpful advice: "get the cheapest one that fits". Tried several ones and picked a David Clark H20-10, mostly because it had gel pads which are comfortable when wearing my glasses (all other ones I tried from different manufacturers were equally OK sound-wise).
So +1 for getting a cheap yet comfortable headset for starters. If you stick with flying and decide one day that you want a fancy high-end headset, you'll have your old one as a reserve or for a passenger.