Almost nothing gets the harmonics right to my ears, lol. The exceptions I mention to people are RE0 and HD600, from what I've tried, followed closely by RE252 and RE-ZERO.
By "musical" notes, you mean just the music notes, right? =p
K701 isn't the most musical then, but not unmusical altogether.
My K701 is dampened, by the way. Fixes all the issues, but that's assuming that they are well-amped. I know my Compass can't do it for sure with the carved out, partly mutilated sound K701 gets out of that amp, but my M-Stage can for sure judging by the more complete sound K701 gets out of it. A2000X still runs circles around it - out of an ipod. It is more efficient than my SR325.
Yea, even any speakers I've heard aren't quite right (and I've heard some costing into the tens of thousands). But perfection is not necessary for enjoyment anyway. I have and still throughly enjoy music on "low fi" gear, such as my Cowon D2 and RE2 IEM's.
I didn't even know there was a 701/02 mod. But I'm not the modding type. Stock is usually good enough and if I start to mod something then I go crazy trying to get the mod right to my ears (kind of like if I start to mess with EQ). So I just leave it alone.
I think "toys" is harsh. Many regard all headphones as toys for instance; I've met them. And although the 600's were not to my liking, they are nice cans. I'm sure I'd like the RE0's too and I've almost bought them but then I get sidetracked with all the other IEM options in the sub $100 range (all I'm willing to spend on IEMs) and end up not buying any!
Seems to be the consensus. I have the 702's and am wondering the same thing. I'm looking at the 940's and FA 003's for closed can options that will have the general sound signature approach as the 702's.