Looking for a tubed Preamp around $2000 Used

BAT VK3i will get you a phono section. Modwright linestage can be had new for that amount, no phono stage though. Both should be strong performers. Neither is really "tubey" sounding, instead they add just a touch of that tube magic.

The 2A3s will drive the Cabasses? Interesting.

If you don't need remote volume control (it's a must for me) you might try to find a used Joule Electra LA100. The entire Joule range are great sounding and very musical. My memory of the 2A3s I owned some years ago were they are quite transparent with the right speakers. I think the BAT stuff might be a good match, too. You probably like a faster, more dynamic sound and BAT can give that. Be leary of C-J pres as those available in your price range may be a bit veiled and lacking in dynamics.

Not all VK3i's have a phono stage and the inboard is acceptable but nothing special. A CAT/w phono should be available in that price range. I did like the BAT better than the CAT, but that probably goes against conventional wisdom.

A used Rogue Magnum 99 with phono section (tubed) is within your price range. It is a fantastic preamp; very dynamic, detailed, rich sounding pre. Stereophile did a review on it a few years back and loved it.

There is currently one for sale here on AudioGon for $1475. and it includes the phono section. (and, no, I'm not the seller.)

You might try an Audible Illusions Modulus3A with John Curl phonostage, well regarded and a good bargain,often available on Audiogon.