KEF LS50 wireless. One set of speakers with built-in amplification. Another option is used KEF LS50 passive ($600 - $800) with a PeachTree NOVA 150 or 300. The NOVA 300 is on sale now for $1500. I had the NOVA 150 with my passive LS50s. Pretty good sound. I have much better gear on te LS50's and the speakers scale to the quality of gear in front of them.
As mentioned above, if you need more bass add the KEF KC62 sub for the passive of active LS50's. I have this combo in a rather large room. It does a decent job. In a smaller room, this would be a killer combo.