Stereo Preamp suggestion


I intend adding a Stereo preamp with HT bypass and subwoofer out to my setup below
KEF R900 mains
KEF R600C Center
KEF T301 surround
Pair of SVS SB3000 Subs
Mains are connected to Parasound A21+ poweramp and the rest is connected to Marantz AVR 7011.
Im looking to get a stereo preamp with HT bypass so as to enhance the music listening experience.
Any thoughts on which brand/model of preamp I could go for considering that I want the subs also to be activated while listening to music. 
I am looking at the following models of Stereo Preamp:
1. Parasound P6
2. Parasound JC2BP
3. Anthem STR 
4. Rotel 1590 MkII

128x128rvr2000
@tony1954Thank you for the response. Yes I have read this link earlier
My source is predominantly Tidal, Spotify and youtube. Let me know your thoughts around Anthem STR if you have come across since it has the ARC and If i understand it right, it has the flexibility on tuning the subs suitably.
Rotel RC1590 sucks too much of noise and humming 
PARASOUND P6 is your best choice pair together with A21+
I tried P6 when it was first released.. find it pretty universal and functional but boring sounding. +1 for Modwright LS100 and Herron VTSP-360 Reference. 
I purchased a Linear Tube MicroZOTL about 8 months ago. I am very pleased. Prior to that i was using my Marantz AV8801 prepro as my 2 channel preamp. Adding the LTA to fill that role made one of the biggest positive changes to the sound of my system. Also, I found them to be a great company to deal with.