Sandy,
Make sure you read this whole thread - there is a lot of good advice based on practical experience.
I strongly recommend that whatever headset you choose, try it before you buy. Ten minutes wandering around a pilot store doesn't do it - you need to go for a flight of more than one hour.
DCs are very good headsets but I can't wear one for a long time - my head is too broad! I have been using a Lightspeed 2 noise-cancelling headset for the last five years. Expensive but well worth it in my opinion.