Since you classical I would definitely consider Sonus Faber. I have a pair of the Lumina Series bookshelf's. Solid bass for their size and if you pair them with a previously owned McIntosh (space permitting) you may have enough left over for a REL sub. McIntosh and Sonus Faber play very nice together. If McIntosh won't work you could try Rotel. I also have some Rotel equipment and they often have some "scratch n dent" products discounted off of their regular price. I have some Rotel amps and also integrated. If you go this route you could spend less than $3K on a decent integrated and have more $ for speakers and definitely room for a sub. The only missing piece is tubes so if you decide to go solid these are some ideas for you.
Let us know how you make out and good luck.