Hey, I'm looking for a pair of in ear headphones.

Was looking at the SE310's

Does anybody have any opinion on them, or could recommend something else?
A lot of opinions on the internet about it lacking bass, but then a lot of people aren't in a position to say, and seem to think that songs can be made to sound great by whacking up the bass. Not actually planning to mix music with these, just want a decent pair to listen back through, as close to home as possible. Prefer true flat response to 'sounds nice'

So opinions, reviews, advice,
my budget, £100-£200 off the internet. (£200-300 on the street!)