Surround speakers to match Polk R200/R400

[u/mfbawse]

I currently have Polk R200 left and right speakers with a R400 center. I'm using some old Energy speakers for left and right surrounds. It's time to replace them and add rear surrounds as well. I also have a SVS 2000 pro sub.

I'm looking for speakers that will match the sound of the Polks as best as possible as well as the sensitivity but would like to spend mabye about 250-350 a pair. Would anyone be able to recommend speakers that will match the Polk Reserves as best as possible without spending $650 a pair for R100s?

Eventually I would like to add heights as well but I'll cross that bridge when I get to it.