HELP SUGGESTIONS FOR A BETTER SOUND

This is my first discussion post. Thank you for any suggestions you may have.

I own a pair of Phil Jones Platinum Solos and am considering urgrading to a different speaker. The problem is they still sound so damn good after 13 years. I'm powering them with a Bryston 4B and just upgraded my preamp from a Conrad Johnson PV10 to an Audio Research LS17. They're really singing now. Gorgeous controlled bass. I've been talking with Phil Jones about his AAD Silver Reference 5 (3500.00) but wonder what difference or improvement in sound I should expect. I don't know whether I need to upgrade my speakers or not. I think I am wanting a larger soundstage, but don't want to sacrifice the detail I get with these Solos. Any suggestions? Currently using Nordost Gold Flatline speaker cable (don't shoot me ), so do you think that maybe I should upgrade my cable first? Any suggestions on a cable here either? Last,I have purchased a pair of Synergistic Research Designer Reference 2 x-series xlr w/mpc (active) interconnects to replace my 13 year old SR Mark V (non active)interconnects from Audiogon that will arrive on Wednesday. Hoping this will improve the sound too. I guess I'm wondering if I should be tweaking instead of upgrading my system.

Jim