High End Bookshelf Speakers

Class A Monos may not be essential.  Certainly stepping up to a more powerful amp from pass would be a good option.

There are other manufacturers that produce warmer Class AB or even hybrid Class D.  You could also consider McIntosh, Naim, AVM or others that have a warmer sound profile.  They will run cooler, get to temp and sound optimal much faster and IMO, sound just as good.  

Not enough power in a relatively big room.  The 805 D3s are the better option by far considering the amplification but I would look for a more efficient speaker or eventually seek out a more powerful amp.