Mike...if you are worried about the heat from the Pass amps, you will have the same issue with all "true" class A amps, so if you consider the Pass, Accuphase, and BSC amps, then you may want to consider putting in an extra quiet split AC unit in there to cool that room down when the amps are in use.
The list of world class SS pre/amp combos have largely been enumerated: Ayre KX-R/MX-R Twenty, D'Ag combo, Constellation, Soulution, Naim, Hegel, etc...
The ones I would add to that list: Vitus (Class A and Class A/B for the amps and their pre and phono pres have gotten stellar reviews), Simaudio Moon Evolution series (line and phono pres and stereo/mono amps in the 800 series models), and Luxman (pre and Class A amps are phenomenal).
I have not heard the Vitus but I have heard the Simaudio and Luxman gear (various models) and they are awesome. Some pics/links for your perusal....
Simaudio:
850 Pre:
Preamplifiers MOON Evolution | Simaudio
Reviews:
Simaudio Moon Evolution 850P line preamplifier | Stereophile.com
Simaudio MOON 850P Evolution Preamplifier ? Reviews | TONEAudio MAGAZINE
Simaudio MOON 850P Evolution Preamplifier ? Reviews | TONEAudio MAGAZINE
Pics:
880M Mono Amps:
Power Amplifiers MOON Evolution | Simaudio
Reviews:
Simaudio Moon Evolution 880M monoblock power amplifier | Stereophile.com
Pics:
I won't go over the 810P phono because I am presuming you are going to stick with the Ref 2SE but the 810P was positively reviewed by Fremer.
Luxman:
C-800F:
On a Higher Note :: C-800f Control Amplifier
M-800A Class A Mono Amps:
On a Higher Note :: M-800A Pure A Stereo Amplifier (heard these with C-800F...scary good!
Reviews:
luxman 800
Pics:
Hope I have provided you with a few additional things to think about. I have not gone down the road of providing you links/reviews/pics for Vitus because I havenot heard personally but everything I have read suggests excellent gear as well. Of course the Simaudio is Class AB and the Luxman is Class A. Enjoy.