??? How Much Would You Spend ???

So the last 5 years I have had a Raven Audio Osprey Tube Amp with their Corvus Speakers and I have been really thrilled with what I hear out of this beautiful amp...At 73 yrs old and having tinnitus pretty bad I have wondered if I really could hear much more than I do with this unit..I talked to Raven and they told me they would give me a trade in on 5 yr old Osprey for the Reflection they make..I would be another 14k to get this unit and believe me I had  to really talk myself in..But I finally did and I am so happy I did for the music and detail I hear coming out of songs that I never knew existed all these years even from Oldies songs I am blown away..But it is what you are willing to spend for best quality sound you desire to hear...And those 5 years with Osprey I thought was my best and I have a whole new sound that will last me for years of enjoyment...  

in your scenario you have established the price of the speakers. My personal preference would then be to spend roughly 7-10 thousand on the amp, dac and preamp and I would prioritize the preamp if I had to make choices
 

I would also allocate some of your budget for at least modest room treatments. But that’s just me, and I think the best advice anyone can give you is to listen to the components that are under consideration. we can all recommend that you buy what we have, and that may not at all be the sound that will be most pleasing to you. The way we hear is very subjective. Some people like a warmer more musical sound, but there are others who don’t care for that at all. You may listen to a component that you think is exactly what you want for far less money, or perhaps far more, than some arbitrary figure. It’s about getting the best value for the money you have to spend in terms of the sound that’s most pleasing to you and I don’t think you can really know the best way to allocate your budget until you start putting components together and hearing them for yourself. 

Speaker Selected First = Make a provision for the Signal received to be turned into an end sound that is the best.

Thereare dependencies on all that is upstream and the ambient of the environment to Control this method. 

Source Selected First = Signal produced and sent is the best one can have created for their budget.

This is my choice for a Audio System, 

Only thing I have learned in 50 years is never spend more than 75% of the current speaker price on any single component ahead of them. The one exception would be for vinyl-based systems where the whole phono chain is considered a single component. So considered, you might pay more for the phono chain than the current MRSP of your speakers.

Tough to find a consensus because we have different budgets and spending priorities - those with larger budgets would usually spend more than those on a more restricted budgets. Rough guess those on a tight budget 3-7k for electronics (pre+amp) and those with loose wallets 10-15k+. Above this amount speaker upgrade becomes an attractive budget alternative.