Suggestions on improvement

 I'm 78 with age related  hearing decline.My current system which I do enjoy is comprised of a  Marantz CD cd 60006,Technics integrated SUG700,Canton stand mounted 9k reference speakers, and  two SVS SB1000 pro subs, Subs interconnects are SVS. Stand mounted are connected by marker cables on upper frequencies and monster cables Powerline 2 for mids and bass. 

Speakers are placed 8 ft apart the listening position is also 8 ft.The  room is untouchable,that is to say wife has fixed my location,hey no smirks, I know where my beard is buttered.The room has vaulted ceiling 14 ft(at sitting position),has one open sidewall,another is 3 ft behinds the speakers and is covered in  floor to ceiling drapes on a 9 ft wall,the third wall on one side is all glass (glass door and full length window next to it ) the final wall behind the sitting position has glass covered photos and prints.On The sides of each speaker are over stuffed chairs with a couch facing the speakers.Hanging plants are in all corners.The room has wall to wall carpeting. For domestic tranquility I can only subtract components so bass traps and alike are verboten. I listen Stones, Beatles, Who,female solos, symphonies,and jazz(sax oriented).

Are there any cheap tweeks to improve current system given the above, max budget $1000.However if can improve my sound by selling off apiece of gear and adding that revenue I'd do it, just don't know what I'd get off the sale.