700.00 speakers new or used


any 700.00 that you can listen all day and not  get  tired
crashmars
Crashmars,This 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.
+1
Also, how big/small is the listening room?


Depends upon your listening room, gear and experience/personal taste.

All of the above are MIA in your query.

DeKay