Asking suggestion for $15,000 audio system for classical music

Spending the same amount of money, can I get a better solid state amplifier than tube amplifier because, on average, the tube amp is more expensive?

Wiser and much more beneficial to ask a very different question...

Counter to miller's and ivan's  convictions on tweaks...

is the position that they should come after you have established your system and are familiar with it.

Build your system first (i.e. components and cabling). It will let you know what it needs. Then address those needs, should you feel and believe they are worth pursuing.

I listen exclusively to Classical.  The OP should allow for SACD capability, as Classical has kept the SACD medium alive and there are thousands of Classical titles in that medium I would therefore get a Universal Disc Player, such as the latest by Sony, Pioneer, or perhaps Yamaha 

 Thanks everyone here for giving me so much suggestion and information. You are so friendly.

I live in Houston area and I am going to choose one of my rooms as listening room. The living room is 20'x18', the height is 10' (flat ceiling). However, it has 4 exists and a window. The other room is 13.5'x13.5', height is 12' (triangle ceiling). 
I like almost all kinds of classical music, like symphonic, chamber, opera, vocal and instruments. But most of time, I listen piano, chamber and symphony. I don't put the volume very high. 
I am not the equipment fun. Just want to have a good audio system and use it for the next 20 years.
Does someone know the good dealers in Houston area and the user groups? Do the good dealer come to my home and help me manage the equipment location?
I hope I have answered the basic information and background. Again, thank you so much!

Save about 2-3K for room acoustic treatments. Contact GIK acoustics and talk to them about your rooms and options.