It may well be worthwhile, whatever you have now or intend to get, having a word with Headset Services on Shoreham Airfield. Apart from being stockists for all things headset, they do a very nice line in custom made adaptors and convertors and at a decent price.
Their site also gives a basic rundown on connector types, differences, etc.
And Whirly should you want an adaptor to use a UK Nato (brass) plug with a US Nato (nickel) socket, mine cost about £40 all inc from them.
