Thanks again Joker!
So it's basically narrowed down to the Shure 215 and the FXD80 (not too bothered about the mic version as I'll probably get the Bluetooth adapter)
If the FXD80 is basically just a better version of the AM800 (as in similar V shapeness), how do the Shures fit in?
(also looking at some Jaybird BlueBuds, going on ebay atm for £80, which is out of budget but then again, they do look pretty cool)
The Shures are not v-shaped. They have more bass than your AM-800 but are warmer and not as bright, with not nearly as much treble sparkle.