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these are worth a look. Very pleased with mine.
http://uk.akg.com/akg-product-detail_uk/akg_y45btblk.html -
These Sony's are meant to be OK, Sony MDR-ZX770BN, but I'm not sure if there's anything great in that range.
These are probably decent for under £100 http://www.amazon.co.uk/Sennheiser-MM400-X-Bluetooth-Headphones-Compatibility/dp/B007JG54DG but are on-ear. I've been using the previous model (PXC 310) for the past 5 years and still going strong.
@skinny You're probably better looking at decent earbuds and isolating tips if you don't want to spend loads. These always get a mention http://www.amazon.co.uk/Etymotic-Research-Portable-iPhone-Earphones--Black/dp/B000XPG2QI Personally I like the Comply tips which block a fair bit of noise (but aren't that cheap and do need replacing every so often).
What's the current recommendation on sub £100 Bluetooth over-ear headphones folks? No1 Daughter's birthday in a few weeks and that's top of her want list.