Why are my SF Venere S Speakers not sounding as warm?


I have a beautiful pair of Walnut Sonus Faber Venere S speakers and I use them for everyday surround sound/music listening in our living room.  The issue is I fell in love with these speakers in the showroom, and when I set them up in my living room they sounded almost piercingly bright and not nearly as balanced and pleasant.  I have bi amped them with my Marantz SR 6012 Surround Receiver, ran the room EQ set up as well as tried to manually EQ the system.  I was able to take some of the brightness out and get them to a more balanced sound.  I am VERY happy at the un-hindered sound quality they produce.  However there is not near as much bass as there seemed to be in the showroom (I had them disconnect the separate sub).  Now I understand my room is not treated and that of course makes a difference.  I added a Definitive Technology SuperCube 2000 and that has helped, surprising amount of bass for such a small discreet sub.  What are your suggestions?  What am I missing on the set up of these speakers to get the full range from them?

We have a tile floor and a raised ceiling that is at an angle from approx 9' up to 15'.  We have a large fabric couch with an area rug and wooden coffee table.  The dimensions of the room are approximately 14' deep and 19' wide.

tice34
In my opinion, a well designed speaker should not sound bright because of inferior electronics or cables.  Front end equipment can modify the sound of the speaker somewhat but they cannot change the sound such that it will be unacceptably bright.
I have almost the exact same dimensions as the OP including the same vaulted ceiling from 9 to 15’. Bass from the 802D3 is good, but I do use a little boosting on the preamp. That said, I would agree with above that the first place to look is amplification. In addition, for home theater you’re going to want a great sub or 2. I’ve got the SVS SB-16 and my bass is prolific. 
@tice34 

First let me ask you this : are you only doing stereo setup for listening to music only or surrounds for both HT and stereo music? Cause you are using the Marantz SR6012 av receiver so I automatically assumed that you have a surround system setup. 

If you're only doing stereo and use your setup to only listen to stereo music I wouldn't get AV separates, I would recommend getting a good quality stereo integrated amp or good quality stereo preamp + stereo power amp. 
Stereo gears will sound better than multi-channel gears. 
Wow, THANK YOU everyone for the insight and education I very much appreciate it and is exactly what I was looking for.  I definitely know I need to do some treatment to my room but I was really wondering about needing better amps and such and you all gave great advice.  I will start doing some research, I am also going to return to the show room to see what I missed.  I know they used McIntosh equipment with the Venere S setup they had I just don't know what else they had or how much power they actually had running to these.  This will be a work in progress as I am sure most of you have your own audio projects ongoing.  But this gives me a good direction
If you are buying Sonus Faber level gear from this dealer, they should be willing to go to your house and evaluate your listening space and try to find out why it's sounding bad.