I've just got a set of MS-1i on it's way to my home!
It's finally here and smells good.
The first piece I tried was Jaco Pastorius' "Liberty City" and it felt like: "Wow! Should have bought a K601...". Brass sounds like disaster, headstage is crumpled, but Jaco's bass sounds good. I used the same track yesterday after doing some necromancy to my wife's K240M and it sounded next to perfect: lots of gently positioned timbres with only a little coloration, my modded T20RP are even better. Not that I was disappointed, but that was enough to state that Alessandros aren't neutral at all.
The box says: "Heritage matters", so the next piece I tried was Opeth's "Heritage". Not bad, but bass felt bloated. The next piece, "Devil's Orchard" felt oversimplified, so I switched to an earlier album. "Deliverance" rocked. I don't find Fostex bad for metall stuff, but sometimes being less analytical is good.
I liked how Alessandros present Gypsy Kings and finally turned to like Jaco Pastorius live records, but any time I'd hunt for fine detail I'd go with T20RP.
Alessandro MS-1i are very sensitive to source: their de-stressed drivers (note the open holes in baffle) require lots of control from the amp, so I find the fully-damped SR-60 a better option for ampless portable use. I compared E-MU Tracker Pre to iPhone and, while E-MU pushes lots of powerful bass through Alessandros, iPhone just sounds mushy.
Comfort-wise S-Cushions are great, much better than L-Cushions I had on SR-80.
Finally, Music Series One is a keeper, just because having a Grado is a must once you build a small headphone collection. They fail to be perfect in almost any aspect but once you dig their signature, the're good to have at your hand (or on your head).