Ewan, I appreciate that you are new here but may I suggest you do a search on headsets which will bring up lots and lots of threads and information for you. It will also save those of us who have posted on one or more of them from having to do so again.
Search - click search at top of page, then advanced search. In keywords box put "headsets" then look for "Search in Forum(s)" and put Private Flying in this then click the "Search now" button.