So I've gone today to the store to listen these Shure's and they sound too high, without the bottom. Completely not my taste.
I took the ATH-M30X, M35, M40X, M50 and M50X and listened to all. I decided for M50X.
M30X, M35 sound very light, not much power in it. M40X sound quite powerful, slightly lighter than M50X (on Mac OSX I had to give them one more level UP on system volume), but the lows are not really interesting (it's very similar to M50X but without that much power, not cleaner in any way, just quieter). The old M50's are loud but they lack of lows and the treble is too distorted.
M50X have power, they're loud, lows a little bit too charged, mids are quite flat and clean, highs are clean (but as I said before a little bit calmer than Grados).
I will EQ these in home studio, and should be nice.
For outdoor use they are also perfect.
I also listened to AKG K701 - nice reference sound!
Edited by ErnestPoland - 6/13/14 at 9:13am