Tube amp with SS like bass

I demoed a used BAT VK-60 amp and while the mids and highs were very good I just could not warm up to the bass. I have the VK-200 and am spoiled by its wonderfully tight bass response.

Can I have what I'm looking for under 2K, preferably, 1.5K?

Contenders are:
Butler 2250
Audio Research VS-55
BAT VK-55
Rogue 90

Any others to consider?

Jack