The great thing about Audiogon is buying used and minimizing potnetial downside. Your room is not too large, why not think about seom monitors (Pardigm S2, B&W 805, Totem's), Quad ESL 57's, or Magnepan MMG's. Amp will depend on which speaker you choose.
What type of music do you intend to listen to most of the time?
What type of music do you intend to listen to most of the time?