Shure SE425 or SE215? Can't decide

I can get the 425's for a good price but I have heard they lack in Bass. The 215's are said to be quite bassy so I'm leaning towards them but I'm thinking surely considering the 425's are 'normally' so expensive they must be better than the 215's in every way?

Alternatively I could buy the 215's and a new iPod to use with them.. The 425's are still quite expensive (a bit more than twice the price) so I would just stick with my android phone. Just wouldn't mind a dedicated device for music.