700.00 speakers new or used

I would recommend Klipsch RP-600 or even the RPM-160m. Based on your listening habits and room size. Clarity at low volumes and can crank if you need to. The RPM-160m is around $400. This would leave room for a decent sub and your all set. Klipsch has done a great job with these speakers, they punch above their price point. 

Op where are you located 

CrashmarsThis is a tough question to answer as you have not listed your amp nor source. Something like a Klipsch Heresy can be purchased used for your budget and rock the house with a flea watt ebay  amp. On the other hand,  some speakers, for instance some versions of Thiels are going to require many thousands of dollars in amplification. Location would help as someone with time and inclination might look on your local craigslist and make a recommendation.

https://www.musicdirect.com/speakers/wharfedale-denton-80th-anniversary-bookshelf-speakers-pr

Just bought Maggie 1.6es for 700