You should probably define what you want them to Sound like, what type of music you listen to most often, and how loud do you want to turn them up. Also, how large can the boxes (cabinets) be and still be acceptable?
You are going to get a hundred suggestions, ha!
Used is a good idea, because number of people that want full sized stereo is dwindling. Perhaps search on Craigslist near you or Searchtempest for the whole country. I recently missed an originally $6000 speakers for $800 because I reacted too slow. For craigslist, sort by highest price first, then research some online reviews for whatever you find that looks good.
I recently bought a pair of Thiel CS 2_2 for $650. Finished on all sides, wires connect under the bottom. High quality light oak real wood veneer.
Caveats - a couple chips out of veneer on top of one. Too heavy too ship. Perhaps too old fashioned, unless you have Danish mid century furniture, ha! (a simple tall rectangle with front cut off to form a slope). This is not a sale listing, just giving you an idea of what you could find on Craigslist.
If you are concerned about being up to date, there are several companies coming out with amplified speakers that also include room correction processing. This is where the future might be heading.
Good luck!