CX300 for less than £20 are likely to be fake. Denon AH-C252’s are good, but cables are always an issue, I’m currently trying to replace a pair of Ultimate Ears SuperFi 5vi phones, that in turn replaced a pair of SuperFi 4vi’s, that cost $124. Same problem, cable broken at the plug. I’m hoping to replace those with SuperFi 3 Studio phones. I’d recommend that model, even though they’re £49.95 from themp3company.com, because the cables are replacable, they just unplug from the earpiece. Soundwise, they’re stunning, and they are very comfortable. There are a range of cheaper UE ‘phones, but there’s nothing on the market under £200 with replacable cables. Cables are around £20.