Advice for Neophyte Assembling a System

I own the Sophias and use, as a back up, a Pass XA30.5 rated at 30 watts with similar room restraints as yours and it works marvelously. With that said the Sophias look to be a bit more efficient than the Sabrinas so I would hesitate using 30 watts and since you are system building from the ground up go with a more powerful amp. The Sabrinas are a great speaker and should work equally well with tube or solid state amps. My preference on power and pre would be separated with no hesitation for all the obvious reasons. Happy listening and if you do purchase the Sabrinas let us know how you like them after they are settled in or what you choose instead of them and why.

Thanks very much for your thoughts. Greatly appreciated. Wondering which amp you might suggest would pair well with the Sabrinas? 

There are a load of great amps out there, tube and solid state, for the last year and a half I have been using a pair of Quicksilver M120s that I got a very good deal on brand new, never unboxed from a guy here on Agon and planned to use them while my VTL 125 monos which were 20 years old were being rebuilt by VTL, liked the Quicksilvers as much so just sold the failing VTLs to a guy that was going to do the work himself and never looked back. You seem to be in the solid state camp and am sure you will get some great recommendations on those as well. $40,000.00 is a very attractive budget and is about what I have in my system after all is said and done, which I am except for funds needed to replace any failing components when the time cones. FWIW I have seen a few pairs of the Sabrinas come up here for less than $10,000.00, either way you should be able to get one hell of a system for your investment.