A few things jump out at me...
1 - The rooms they're in probably have a lot to do with why they don't sound too good. How are the acoustics in the kitchen, of all places?
2 - The systems are odd, as a lot of stuff isn't exactly made to be paired up with the rest of it - Sonus Faber Liutos shouldn't be paired up with an AV receiver, and the ML speakers as surrounds don't help matters as they're an entirely different sounding speaker.
You're probably past this point, but you should get out and hear systems that have been put together by dealers. I know the rudeness (I live near NYC), but there's got to be a dealer who's willing to sit down with you and help you make decisions.
Try putting together one system at a time, as has been suggested. Taking your best amplification, speakers, and source and moving it into a good room - not the kitchen or dining room - will probably help things along.