WOW, people
I just saw The Light!
Until now, when I was comparing my SM3 to my other phones (IE8 and RE-252), each one has something to offer over the other. The SM3 did the most things right, but the RE-252 had better overall clarity and seemed more transparent. The IE8 wasn't really better in any area, imo, but offered more bass, and a different presentation (more space).
But today, after listening to the SM3 with the filter mod for a couple of days ( and without being able to fault them in any area), I made a quick comparison with my other phones.
The SHOCK! My biggest surprise is how even the RE-252 seemed less transparent and clear than the SM3 now! So basically, their only advantage over the SM3 is gone!
There is still more space in the RE-252 presentation, but that's a matter of taste, and I actually went from hating the "in the head" presentation to loving it now.
Compared to the Hifiman, the SM3 have much more bass impact. Bass speed is very good on the RE-252, but it lacks weight.
Now, compared to the IE8...well, really, the only thing those are doing better is maybe the very relaxed presentation. There is more bass, but it's sooo sloppy compared to the others two.
Midrange is coloured and veiled, details are really laid back, and the soundstage is nowhere near as large as the SM3 (cannot believe I say this!).
In a nutshell, I really feel like they are not in the same category. That's my personal impression of course, your mileage may vary.
But I strongly recommend trying this mod if only to hear what it can bring to you.
Time to go back to some intense listening pleasure
Cheers