denjer1,
I agree with both big_greg and atmosphere. You like tubes so why not try all tubes first? What matters is your opinion.
If you're going to buy new, I'd suggest visiting local dealers and requesting an in-home loaner you can audition in your system. The Bat VK-53SE tube pre might be a good match with your Bat amp.
If you're buying used, I'd suggest buying a good quality unit that you can resell easily just in case.
Enjoy,
Tim