I have a Flightcom Denali ANR headset, bought it in the US for around $400 a few years back. Its a nice yellow colour too
Fantastic headset, one PP3 9v battery powers it for hours (and you can carry a spare). It cuts out all the low rumble and I'll tell you what after using one on a long cross country you'll never go back. ATC is much clearer, you don't get the headache, you can still hear high frequency warnings / stall warners etc....
You can get one delivered from the USA for £300 in 5 business days at todays exchange rate, or if you know someone going over, £280ish.