Leben Cs600 and LM 219iA

As Charles mentions above, these are two completely different designs.  Probably as much different in overall sound as there are similarities. 

I've never heard either with the Zu's, so really hard to say which the OP would prefer with his musical tastes.  Both would likely be extremely good however.

For ROXY54 -- I'm located in NC. (Lexington area)

Goldprintaudio, 
The reason I asked where your store is located is because  I live in AZ and Arizona hi from is also a dealer for Leben and Line Magnetic,  and I was wondering if you worked there. 

Thanks Roxy.  I don't work for them, but know them there very well.  Nice group of guys.