I currently own the original B&W C5 and have a sort of love/hate relationship with them. I love the clarity and definition of the highs, but I hate the horribly bloated, murky low end. I have tried on many occasions to acclimate to them with no luck, they are just too bassy. If I don't seat them firmly in my ear canals, the bass lessens but becomes indistinct. My question is this: Is the Series 2 enough of an upgrade to warrant purchasing them, or are they just more of the same? Also, I just picked up the RHA MA750i and really like them. Can anyone compare the MA750i and the C5 Series 2? Thanks so much for your input!