700.00 speakers new or used

Just bought Maggie 1.6es for 700

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?

find an extra $100 in the couch for a $1500 pair of German gems.
https://www.accessories4less.com/make-a-store/item/cantvento830.2blka/canton-vento-830.2-7-2-way-bookshelf-speaker-black-gloss-pair/1.html

Q Acoustics 3030i/3050i

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

All of the above are MIA in your query.

DeKay