I visited a home with a similar setup and it sounded dreadful. Dead. No life. The guy had spent a ton of money on it too, and he knew it wasn't right. The key to success is to have the room properly measured and evaluated before spending a dime of treatments. You would be amazed what can be done with the addition of crown molding, the judicious placement of a pair of subs, and where the main speakers and listener are positioned in the room. Every room is different, but my experience is that less is more in most cases. Generally speaking coffee tables cause trouble and have no place in the listening room and chairs and sofas are most often better covered in fabric than in leather. Moving them even an inch or two one way or another to optimize sound can make a big difference. All positions once determined during the room evaluation process need to be marked so that optimization is not compromised by the cleaning lady or some such with the passage of time. Room treatments come last.