Am I assuming that you are saying you have 4K for the speakers and 2.5K for the int amp, or $4k total for all? Assuming the former...
Take a hard look at Vienna Acoustics Beethoven Concert Grands: A pr. just went @$3500 used, but you could proabaly be patient for a bit better price in a few months. Full range, nice cabinets, long range satisfaction factor, not too terribly hard to drive, great vocals and staging. That would leave you an extra $500 for the int amp. At $3000 for an int amp, I would expect the deals to be getting even better towards late summer...if you could scam a Pass or Accuphase that would be berry, berry nice...
Or, get real real and look at some Quad 989's...might not have enough of that classical umpff for you, but you might not care by then. Sound good on relatively cheap gear. If I were you, I'd do the Quads...