Thanks to everyone who gave their advice on my earlier post about what to buy. After much online research I went for the Halo from Quiet Technologies and they arrived yesterday. Click on the thumbnails to enlarge.
My decision was based largely on price and comfort, the idea of in-ear phones was appealing but I had read some reports that microphone placement could be tough so the small headband (that can go around the neck) that comes with the Halo seemed like a good compromise.
I have my club-mandated annual flight review on Monday and will hopefully get to try them out then. In the meantime I have to experiment with how best to wear them.