I have only had a couple occasions to hear the Lngdorf system and all were in heavily compimissed spaces.
These experiences were not very positive.
I'd make sure you listen to a Wisdom system before you write the check. http://www.wisdomaudio.com/products_sage-series.php
IMHO I think they are some of the best performing systems available.
They have such a Jeckly & Hyde nature.
You can listen to an intimate vintage jazz recording that provides a sense of being there like nothing else I have experienced.
Then fire up a block buster like Lone Survivor and scare yourself with the realisim and bone crushing dynamics.
Every new recording or movie is a "holy shite this is amazing" moment.
I'd highly recommend the L75's all around, a pr
of STS subwoofers and a rack full of dual purpose arc welder/amps from LabGruppen.
This combination with scare children and stun small animals with ease.
Full disclosure I bought a Wisdom system over Lngdorf and couldn't be more thrilled.
Oh and don't put the speakers or at a min the center anywhere but behind the screen.
With either of these system and a high quality woven screen there will be zero compromises in fidelity with realisim that only a center speaker behind the screen can delivery.