upgrades

That is some nice stuff there. Put the speakers on Townshend Podiums, put the VPI on Townshend Platform, and everything else on Pods. You will not believe the improvement.

Then get some TA-102 fO.Q tape. Cut a piece to fit between the cart and headshell. Put another thin strip down the underside of the tone arm. Put the rest anywhere else you like. Terrific stuff. Highly effective. Put Synergistic PHT (Black and Green) on the cart, and HFT on the speakers. Get Synergistic or AudioQuest or Cable Elevators or whatever ones you like, just get em, and get your cables up off the floor.    

Not just speaker. All your cables.  

For the subs you can save some money using Nobsound springs instead of Pods. But do get a couple more subs, as many as you can afford, to get to at least four. This will be another shocker.

Do all these, you will not believe. Very likely your system will sound better like this than anything you have heard anywhere at any price. But if not no worries, we haven’t even pulled out the big guns yet. I can hook you up. But first things first.

I've yet to hear a pre-amp (or amp) that bests the Convergent SL-1.  Have you heard one or given it any thought?

I Will  Try   The   TA-102 FO.Q  Tape i wonder if two many Tweks  gets  a little out of hand  with a reverse effect  

if you value the time, phase and coherent launch in your current speakers, you should give the Vandersteen Treo CT a listen. 

of course, you know what you are replacing is legend.

have fun….

Have to actually agree with Millercarbon (for once) about isolating speakers. I have B&W 805 D3 speakers, recently placed on IsoAcoustic Gaii's. Transformative sound. In fact the single biggest improvement made so far in my system.