i feel your pain bangra.
i know i will be getting the sensas soon, but not because they will be replacing my e5c's.
i am a musician and for this reason only can i push myself over the edge in rationalizing purchasing the 2-X's. if i were not a musician, i would have a very difficult time allowing myself to buy them. when i do eventually purhcase them, i will be using them more for composing then i will for listening to my ipod; thats what the e5's are for. the e5's are my end-all ipod headphone, period. They are the best consumer canalphone IMO that exists.
i think it is crazy to use the sensas or the ue's (with the exception of the ue-5c which is still a consumer-geared product) with an ipod or for casual listening. as a musician, i guess i feel it is (puts on flame retardant suit) kinda sac religious to use these for just casual listening to music.
sometimes you just gotta have the discipline to draw the line. and as far as the ipod goes - the e5c are my heaven.
to each his own.