You have plenty of options for $17,000.

Go for the Magnepans with that kind of taste in music. 3.6's as the mains, CC3 for center and MC1's as rear channel. Sony 52"XBR4 LCD TV. And a REL Britannia Sub which matches very well with the Magnepans.

Or a Theil system of CS 2.4's or 3.6's for front channels and the SCS4 rears, MCS1 for the center. For a sub either of these REL subs Britannia B3 as my first choice, its an awesome sub, or the R-305. If you dont want to spend 2K on a sub then the Velodyne SPL-1000R

Both these systems would be great for piano and orchestral music.

I would seriously consider the Cambridge Audio 840c as a CDP. There are better for more money, but the 840c is alot of bang for the buck if your looking to save a little money.

As far as amps, I'll leave that to other people.