I got a set of DC H10-60 for my CPL. If you go for the noise cancelling ones, the only down side is the battery life and the agro when they go and the fact that when you are flying, throttle and prop adjustments are best done by feel at first, then fine adjusted. My point is that the guages don't tell you when the props are in sync. (twins). Of you can't hear the props properly, you will find it hard. Further, how can you tell if the engine is labouring, missfiring or loosing power. The noise isn't that loud and the standard headsets are fine. Avoid Peltor as they will fail after a few years and I find the Sennheiser brand painful around the ears after an hour (yes I do have nornal ears...).
DC are by far the best investment
H10-13.4 or H10-60
Ebay.....good bargains. Don't pay Transair prices.