Room problems-want to up grade speakers.

My living is not a music room. I have furniture and love-seats, and a sofa and a big screen tv and surround system. It is also home to about 3000 Lp's. a limited number of speakers work well in a room this crowded. my current speakers Castle Howards do good in this room. They are approx. 3.5 feet from the rear wall, approx. 7 feet apart(center to center) I sit nine feet away. There really isn't room for many placement options. Given the space I- have, what speakers do you think would work well here? I listen to mainly rock and roll and blues with a little "cosmic american music". my amp is a Classe ten.
Thnks for your help.