Zulu Alpha is absolutely right.
When I first started learning to fly, I bought a cheap, nasty headset. They didn't last very long and seemed to have compatibility issues with David Clark sets.
Buy a good second hand set on the internet. I bought a set of used DC's 10 years ago, I fly for a living now and I STILL use them
If you REALLY want new, these are about as cheap as you can get . . .
--|HD-1000A|AVIATION HEADSETS, H/PHONES HD | CPC
. . . but a second hand DC set will probably last longer.