Poetpilot,
In my microlight I'm using a Communica intercom, Communica Mk2 helmet with full-face visor and a non n/c Peltor headset.
Excellent bit of kit, good noise reduction and still light on the bonce even after 3.4hrs in one sitting. Almost all the microlighters I know use this gear, no-one says a bad word about it.
Suggest if you want to wear sunglasses under the headset, get the best lenses and the absolutely thinnest frames you can afford... a headset pressing side-wings of glasses/sunglasses into your temples can result in genuine agony after a couple of hours!