I love my Siren V2s and I have four of them (two 22 and two 24). To be fair, they were also the RTA that I was finally able to set up correctly and run without leaks, so it was serendipity all around.
They are my favorite RTA by far, although I will say they can be kind of polarizing. People seem to love or hate them. They can be somewhat restricted with the airflow closed down but for me flavor is best with it wide open.
If I had "too many atomizers" and felt guilt about it, I'm afraid I would have had to throw myself on the sword long ago.
Just don't get an Ares, they taste okay but both of mine broke. One was justified, the other was NOT (a drop versus just touching a post very gently causing the post and air diffuser detatching from the deck. Guilt from too many great atomizers can be dealt with, but annoyance from buying something that will break for no reason.... Much harder.
Good luck in your decision,
Anna