from the headphones i heard (CD3000, HD600, DT880, SR80, RS-1, ER-4P, Shure E5, HP-1000), i rate the RS-1 to be the absolute best elecronica headphones. the CD3000 are second best, but only with the DI/O (but not a mensa, like mine).
however, i'm very slightly eq'ing my RS-1 with bowl pads. using the RA-1 amp fixes the highest frequency problem completly - yet tht range is a bit lacking that way.
with flat pads, the sound is increadible, but ain't very "true" to the recording. it does blow my mind sometimes..
you can read my review of the CD3000 for electronic music in here. in many terms, the CD3000 beat the RS-1 (soundstage, certain aspects of "contrast", macro 3D structure, frontal imaging)
http://www4.head-fi.org/forums/showt...threadid=47421
i used to make psytrance parties with friends, and i know what good amplification sounds like.. the CD3000 has that intoxicating darkness in them with the DI/O when the track supposed to sound scary. the way they diffrentiate between the different part of the spectrum is remarkable, but the RS-1 are more detailed. the note of high pitched electronic sounds is the most precievable, making your mind to "sing" the note more easily.
the RS-1 are more "bad"; attacking, growling, grooving. they are stiff, yet they fly.. however, you might find the CD3000 to fly just as well; they both speak a very different language, both are awesome.
the RS-1 has something that is missing in all other headphones i've heard; honesty. the meening of music just come out with no effort (something people would say about ety's, but they are no match for the RS-1 IMO). female vocals are amazing.. my guess is that you like house music... sometimes female vocals are present.. and the RS-1 definetly stand up to the DT880's class in that area.
the RS-1 more reminds me of car audio (small drivers characteristics), while the CD3000 reminds me big amlification. of coarse that the big picture is that the CD3000 have more speaker like presentation.
the E5 sound too fake for me... something very bad is going in the lower midrange over there.. that's responsible for soundstage but destroys fidelity..
the DT880, HD600, ER-4P/X/S and HP1000 (with bowls!) are definetly behind.
the ER-4's does have good detail, but are too sterile for me. i don't tap my feet.
BTW, a friend of mine, which is DJ for a lot of years, prefered the CD3000+ DI/O on top of the DT880 and HD600. i used to home mix too, and i think that the RS-1+RA-1 combo would be best.
however, i would look into the MS-Pro's if i were you