where's the best difference?

I've been playing around trying to think of the best value change (if I am to make one).I listen to soft rock, blues and some jazz. I would like to find more definition and resolution WITHOUT spending an arm and a leg. I've done a lot of improvement thru, vibration control (Bright Star & Cable lifters), room tuning (Michel Green's Room Tunes) and power correction (Shunyata Venom Defender). I was thinking of a change of my balanced cables (Grover Huffman SX) from my integrated amp to cd with Grover Huffman's Empress cables or would a worthwhile change be to get the Audience AR2p conditioner. Would either of these choices make a significant difference? Or should I go a very prudent way and invest in the Ayre Irrational but Efficacious CD?
Right now I don't have funds to change my Classe CAP 151 integrated (and I want to stay integrated) and my CD is ARC CD 3 Mk 2 is feeding Apogee Slant 6 speakers thru Grover's Silver Ribbons. What ever I do I want it to make a difference that I can hear not just a subtle change trying to hit the next level of performance (and yes my system does sound real good to my ears). Could you help me with your input please?  Thanks in advance.