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
gooddomino
Post removed 
Haven't been able to respond to my own thread due to a GI virus that had floored me. I really like the F2 floorstanders but will go with something bigger in the Tyler line, with a bigger cabinet and woofer in the next six months.

House is very open with an effective listening volume of about 1800 sq. feet up to a 22 foot ceiling.Stereo room is a carved out nook in this loft style arrangement of about 400 sq. feet.

How about the Audio resaerch 100.2? Sounds like this amp was a winner in the midrange.
this is the 10 year old father of the VK-55 and has deep tight bass. Looks like new, has low hours on the tubes, and has original box and manuals, I'd let it go for $900.
Of course I meant the Audio Research 100.2 SS amp. May give me the best of tubes and SS. But do I really get an advantage over my VK-200? Guess I'd have to buy and try.