Bought a system without auditioning, thoughts?

What the hell.  Go for it.  I've done something similar in the past.  It's your $$$$.  This is a crazy hobby, and you felt so inclined to put a system together the way you did, just because you could.  No sweat.  Anyway, if it turns out you aren't satisfied with any part of the system, you can always opt to return an item (if possible), or sell it on the used market.    

Definitely post your impressions once you get settled in

@jshira 

Definitely post your impressions once you get settled in

^^^^^^^^^^

Please do....inquiring minds want to know! 

New KLH Model 7 speakers coming out soon can be placed near front wall and should match well with your Pass as well.

Hard to imagine it will sound bad.  But you have set yourself up for a lot of post-purchase tweaks and swaps so probably not the most cost efficient way of doing it.  Nonetheless, that looks like a hell of a fun time to set up!