A good headset will
always help you communicate on the radio.
If you plan to keep flying, the long term cost of a good headset is well worth every penny.
Every time one goes up for a flight, one hears pilots who are clearly struggling with crap headsets, and crap microphones on crap headsets.
Unfortunately crap mikes are common enough in ATC too (certain desks at Southampton, most UK military units) but there isn't much you can do about it except tell them.
If you can, get the Bose A20. Nothing gets even close.
Most of the headsets in pilot shops are basically crap; they sell because they are cheap and a large % of the pilot population does not plan to be flying for too long after they get their PPL so they don't want to send any money on kit.
However, some of the cheap headsets will take more abuse than a Bose (especially the rather fragile Bose X) and that is a factor if you are going to be lending yours to other people. I have 2 x Bose A20 and 2 x Bose X and always carefully brief passengers that they need to handle them carefully because they don't cost twenty quid
