Got my 900s! Wow! I was using Shure E5's - yes the older 5's with 2 drivers. Always heard the 5's were well loved and I thought I was in portable heaven.
Put the 900s on my iPod Classic and they definitely sound better. Much more detail and instrument separation. Bass much clearer. Then I hooked up my C&C Box+ using line out (I have my music ripped lossless) and things went to another level entirely. Bass strong and extremely detailed.
Have to do more listening but I'm in love!