@KEV G
Sorry it took a month to post this. It turns out I'm lazy. I see you've been playing around with your new addition in the meantime. Someone else asked me for a comparison between the Vega and Andromeda so I thought I'd share what I told him.
Re: Andromeda hiss
My current desktop amp in a Grace M9XX, and the Andromeda are pretty quiet with that. My work DAC is a Dragonfly black. I get a tiny amount of hiss, but at work the background noise covers it up even when no music is playing for the most part. I listen to it through a Pixel 2 phone at about 25% volume. I've read that the Andromeda can have no hiss at all with the iDSD Black Label depending on it's settings, and I've considered picking one up to use at work.
Comparison:
I found the Vega to be easier to put in and more comfortable. It is more generous with source. I tried both IEMs with a Shure Bluetooth cable I've got and the Vega sounded much closer to they way it sounds out of better sources than the Andromeda. The Vega also was more likely of the two to absolutely blow me away with some tracks. The problem though, is that other tracks just didn't sound right due to the bass quantity. I listened to a few electronic songs on the Vega that had so much bass that at normal volume it brought tears to my eyes. Astrix: Alien Turned Human comes to mind. This is awesome sometimes, but can be fatiguing at other times. I loved the way drums feel like you are right there next to them. I primarily listen to progressive metal though, and there were too many songs where I thought, "That doesn't sound right."
The Andromeda are a little more fidgety due to their bulk and nozzle angle, and there can be some hiss, but I haven't found a song yet where they didn't sound great. They keep up well with the music I listen to and generally sound good with everything. I haven't played around with changing the output impedance, e.g. iFi iEMatch. I understand that affects the bass quantity with lower output impedance giving you more bass. Both of my sources have a low output, and the bass quantity is still what I would consider boosted over flat. I thought I was a basshead until the Vega made me question my life as an FYI.
TLDR: While the Vega could blow me away, it could also disappoint. The Andromeda doesn't do that.