Haha! I tend to be very loyal and at this point I feel like I'm married to the Andromeda, so she would have to betray me pretty badly for me to divorce her.
I briefly listened to the U12 at my dealer and I quite liked it. I don't think I have enough experience listening to the 64 Audio lineup, but for now I would put the U12 as my favorite. However, even if I ended up liking them more than the Andro, that's still 2x the money. Not sure I can stretch that far.
Let us know how you feel about the U12t in about a week or so.
Based on my listening "tests", I wouldn't say it sounds really close to the Solaris. I like the Rai Penta, but some of the
wow! seems to be missing compared to the Solaris.
Now I know that the Solaris is properly burned in (even if I'm not sure I'm buying the whole burnin theory, but that's a whole different discussion), but I didn't get a chance to ask about the state of the Penta. The one I borrowed from my dealer and am listening to now could very well be fresh out of the box. Also, the player I'm using is my Galaxy S8 phone (the only "DAP" I kept), which has proven to me to be almost indistinguishable from even high end players when paired with the Andromeda. But it could be that the it pairs poorly with the Penta (the Penta is less sensitive).
Basically what I'm trying to say is that I don't feel at all comfortable making general statements regarding Solaris vs Rai Penta, but in my very limited listening experience I wasn't impressed enough to consider it as a better pick than the Andro or Solaris.
Fit is really good indeed, but there's something weird about it too. It might be because of the venting hole, but I can't seem to get good isolation regardless of how much I fiddle with tips, which makes me constantly question if I have a good seal or not, and as a result, if the sound I'm hearing is the best they can do.