Classical Nirvana for 10-15K

I won't recommend a whole system. What I found the hardest to reproduce for great classical is the low bass detail to bring out the cello and string bass. Add a REL sub, which are real musical audiophile subs (not boom boom boxes). Get at least the Storm III. The cheaper Stratus III is also a nice sub, but does not go as low as the Storm. The extra money for the Storm or better is worth it in my opinion. In addition, the REL actually fills in the bottom of all instruments, which will increase the space and air between all the instruments.

My apology for any confusion. I accidentally sent my last
email out on my wife's audiogon account.

Thanks sugarbrie. You have suggested a much better
question than the one I asked, and answered it. It is
likely that I will go with B&W nautilus speakers. I
understand that B&W makes a subwoofer voiced to match
the nautilus line. Have you ever heard this sub?
What makes the REL that much better?

I am not very familiar with the current crop of high end B&W subs. However the ASW-800 (the Matrix sub) was very very good, and was a great match for the Matrix 800 series. No reason to think the new ones would be any less. The REL's are usually a good match for most speaker lines.

I heard the B&W nautilus + sub with classe amplification. Probably due to room acoustics, the sound was a tad on the dry side; but, generally beautiful. However, that speaker combo alone was easily in your *system* investment range. That leaves precious little for the rest of the system -- or if I'm missing s/thing, pls excuse.
Agreeing w/ Sugar's note about bass clarity & tonal accuracy, I'd also stress the importance of highs -- to bring out harmonics+timbre. Of course, effortless dynamics are a must IMO -- hence the quality of the pre. Cheers!