Cheap tweaks...What would YOU reccomend?

I've got a question. I have my three shelf rack sitting on Herbies Big Fat Dots. I'm not exceeding their weight limit of 200lbs for the 4 dots, but could these Herbies Dots have any negative effect? The feet on my rack are those slightly rounded round feet, not spikes. I'm in tweak mode with a new Hegel H200. My room is fine. One thing I know I should do is xlr to run balanced from my CDP. Hegel recommends this so I'd imagine I'll gain a little something by doing this.

I'm looking for a tad more bass slam like i had with the Rogue Cronus Magnum. Maybe this is impossible. My Harbeth C7es3's are on Skylan stands filled to the top with kitty litter. I'm using Audioquest NRG 4 power cords and Audioquest Rockefeller speaker cables.

The rig is on hardwood with a giant oriental rug in front of it. My room has honestly never been an issue.

I'm also considering Oyaide Rhodium banana plugs for my Rockefellers. Any suggestions?

Now that I sit hear thinking about my integrated amp upgrade, I'm wondering if I might need a sub. May e even just a REL T5 or 7. I only have one dedicated duplex. Can I run the Hegel H200, Audiolab 8200 CDQ and a Sub off a good power strip off the same circuit?