Large sweetspot

I am in the market for new speakers for a my largish living room (20X30 w/ 9' ceilings). We expect to entertain in this room so I would like speakers that sound good over a wide listening area. I would like them to be close to or full range. Other priorities would be NOT bright or fatiguing, efficient enough for modest tube amps, and attactive. My budget is about $4K and I would consider recent model used speakers. I know I may not get all of my wish list in one package but I would like to hear what people thinks comes closest. Thanks in advance.