Best improvement for the buck


I just recently sold a McIntosh mc250 and now have about $900 to spend to improve my system. 
Parasound p5 
Parasound A21 +
Denon dp51f  with grado gold
Magnapan 1.7i 
Klipsch 10" sub on stand
Oppo bdp83 
Blue Jean interconnects 
Sony 8" sub on stand
Monoprice xlp interconnects 
DIY braided speaker cable. 
So now the question is what is the most logical improvement or improvements.any suggestions?
audiomaze
Basically yes. I really tried to like them. However they are opaque and caused a loss of information and dynamics. I found them to be a false economy and was relieved when I moved on.

Having said that, as I do not want to hijack this thread and turn it into a yet another dead end cables war, I will post no responses to any ensuing posts on the matter, period.