Ah, that's good to hear then. I might need to hear a XS in person. There's actually quite a few V-MODA-weilding people in the area. I've seen both the M-100 and M-80 among the street pedestrians. Neat stuff.
Right now, I've gotta say that I'm not enjoying the Zn as much as I remember enjoying my previous Vibes. However, I'm enjoying them in a different way. Back then, the Vibe's huge bass response made listening to music just so fun and I loved singing along to whatever pop music was big back in 2008 (e.g. Justin Timberlake's "What Goes Around" song). Now, 7 years later, I've been exposed to a lot of great headphones and in-ears. I'm enjoying the Zn more than a lot of other in-ears to be honest. Whatever tuning V-MODA did for the Zn, that did the trick for these ears. Most in-ears that I listen to have either 1) no bass, 2) too much bass, 3) upper-midrange emphasis that sounds harsh, 4) treble peak that sounds way too sizzley, 5) no treble. The Zn manages to go right in-between all of those problems for me and I've really been enjoying its sound for how clean it sounds overall.
For me, the Zn is definitely a keeper. I'll have to let a friend listen to them, who likes and listens to in-ears more than me (I like full-sized headphones or full-sized portable headphones myself).