Question- Is it only your table that your wanting to sound a little warmer? Or are you wanting to make ALL your sources (in other workds, the entire system) warmer?
If it's just your table that needs a little more warmth, perhaps you'll want to consider a change in cartridge and/or do the Rega tonearm cable upgrade.
If you're looking to change the sound of the entire system, well, you may want to consider changing out the amp and/or preamp and/or speakers. Interconnects can certainly have a small influence the sound of a system, but they can't fundamentally change the sound. (Assuming, of course, that you already have halfway decent interconnects.)
Regards
Jim
BTW- Am I reading your post right?- Your tube gear is taking a back seat to your SS gear??