Preamp Advice for my System


I am considering changing the preamp in my system. I have a BAT-42KSE and have started to look for something different. How would you compare a Pass X1, Bryston BP-26, or Classe CP-800 to the BAT?  How are those 3 different from each other. The BAT sounds a little laid back to my ears. 
richmos
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What is the amp / speakers / Interconnects/ Speaker cables/ you are driving??????????????????????????????????

I'm driving Apogee Duetta Signatures with Bel Canto Ref 1000 monoblocks. Interconnects and speaker cables are low cost, nothing special.  
Your amplifier has a balanced input.
The BAT is a tube unit- the others are not- do you have a preference in that regard?
FWIW as far as I can tell, the BAT does not support the balanced standard. There are tube preamps that do.
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