Suggestions for a tube pre and power amp

I have no experience with them but like sls883 I would call Doug and ask his opinion taking into consideration the climate you live in as one of them will generate a good deal more heat than the other one.  

None of the CODA amps I owned 16, 11, 8, CSiB get hot. Only sightly warm, nothing like a PASS.

@lals The Schiit Valhalla 3 is not balanced however, it is super cheap and has a trial period. The unit does not need any burn in. It may be worthwhile to hear what I mean by very detailed and holographic tube sound. The Allnic line is better, but the Valhala 3 gets you more than 80% there.

As I write this, I am listening to the Valhalla 3 via a Meitner MA3i DAC and a Schiit Aegir v1 amp on my headphones and it is terrific. It is almost as good as the $15k tube Allnic HPA 15000 OTL/OCL that does the same thing and is sitting next to the Valhalla 3 setup. 

I think your "wish list" is spot on. Any of those pre amps are supposed to be very good. I can vouch for the Coda s5.5-it is really good. I've had one a couple years now. Dead silence backgrounds and a beautiful top end.

I use a Vinnie Rossi L2 SE preamp with 300 Bs in an OTL/OCL design driving Pass Labs XA 60.8 monoblocks. I agree with @yyzsantabarbara  that the sound is detailed and holographic. 
 

One occasionally sees these on sale for roughly $8000 for the preamp and $8000 for the pair of amps. Money well spent. I've also read very nice things about both the Backert preamps and anything Allnic. 

Thank you milpai, will check your systems page. I used to own Harbeth long back. I assume  ProAcs are also similar sounding. 

Thank you sls883. Sure will talk to Doug Dale and find out his suggestions. Regarding balanced or unbalanced preamp from input to output  I need to find out the advantages and then decide.