Steve
I also have the Lorelei & Nemesis . I started out with the Nightingale & the Circe on the back. I then upgraded to the Lorelei. The Nightingale and/or Circe have a high WAF and blend in very well with the Lorelei & Nemesis.
Give Klaus a call and see what he can do on the Nightingale or Circe.
I have pictures of the three speakers (Lorelei, Nightingale & Circe) in the same picture so that you can compare them, but I can not post them to this reply. If you will pm me, I can send you the pictures. The pictures will give you a reference on how the others compare to the Lorelei.