Well, I'm a current Lorelei owner and I trade off between the Loreleis and my other speaker pair, which are the Eminent Technology LFT VIIIA's upgraded with the new tweeter to the VIIIB standard.
Truth is I love them both- the Lorelis have more punch and dynamics, and are way better with bass. Oddly the ET's worked better for me in a smaller listening room, which seems sort of counter-intuitive. It had good punch, and went quite low, to the point where I thought a sub as a bit superfluous in that listening environment. But in the bigger room the Loreleis really go solidly deep, whereas the ET's sound a bit thin.
The Loreleis provide sufficient detail, but here the ET's will better it, though that can be up for argument- just depends on what you like. They both create a nice image, though the ET's might be just slightly more 3-dimensional (on some material the image can project even from behind the listener, which even the Loreleis can do, though not to the degree that the ET's can).
Having said all that, the ET's are not Magnepans, but they are planar (the midrange panels are closer to MG20's in design than 1.6's, or any other Maggie for that matter). I guess what I am getting at is that since I had my first pair of MGIII's, I thought I was a confirmed planar guy, but these Loreleis have proven to me that I can find happiness in the world of dynamic speakers as well- the Loreleis are extremely satisfying to listen to.