Thanks for the comments all.
I have a 3GS currently unlocked but stuck on IOS3.1.3 (I think). I’m working on getting it unlocked permanently but this hasn’t happened yet – until it does I cannot upgrade it to IOS4.
Ideally I’d like the earphones to have volume, FF, RW, stop, play & pause. Not fussed about mic capability.
i didn’t realise the stock earphones as pointed out by 3Fish actually functioned as a remote – thought it was just volume! So this might go some way tbh. However if I did go for the Bluetooth remote I could at least choose a decent earphone rather than the Apple tosh (geddit?!)