Preamp... Solid State or Tube


I am looking for 2-ch preamp that must have HT bypass option to mate with my existing HT processor.  

My budget is 10K for this upgrade.  Couple of preamps comes to mind but I have no experience with these components.  

Ayre KX-5 Twenty
Aesthetix Calypso 
 
My system consist of following components, 

Speakers - B&W 800D2
Source - Aurender N10,  Modwright Elyse DAC, Raysonic CD-128
Amps - Modwright KWA150SE (Pair of them being used in bridge mode)
Processor - Krell 707
Cables - Verastarr Grand Illusion Statement and Signature series

Any recommendations will be highly appreciated. 

128x128lalitk
P.S: One more point is that I wouldn’t be surprised if the input impedance of the KWA 150SE is only half as much in the bridged mono mode Lalit uses as in stereo mode, since in bridged mono mode a single input signal is internally routed into both amplifier channels. If that might matter with a preamp that is being considered, obviously Dan Wright would be the one to ask.

Regards,
-- Al

Al, That's something to think about.  I will reach out to Dan for clarity.  
David12,  the MW LS36.5 can be upgraded to the two box DM here in The States. It has to be sent in to ModWright as it is an extensive procedure. Unless something has changed I know Dan does offer it as I spoke with him on the phone when I ordered my unit. You being in the UK it likely would be too expensive to send it back so maybe it's not an option across the pond. I'm sure eventually I'll send mine into Dan but for now it is sounding great with the little tweaks and tube options I've done.

Almarg:

Thank you for providing such a detailed and lucid response. This is why I love the A'gon! My enjoyment of music and audio go back 40 years but I've not schooled myself in the technical aspects of this hobby. There are so many folks on here that have so much knowledge and wisdom to contribute and I'm grateful.