@aheydorn looking over the specs for both PS and Legacy speaker models you chose in your post [and pairing with your amplifier], and simply looking at efficiency, you might want to compare the two a bit more here to get pairing ideas.
One is 95db, the other 87db, and both are 4ohms - a starting point to consider when pairing with your existing amplifier being able to control multiple speaker drivers. One other thought to share if you are serious about either speaker/models -
Legacy Focus SE or XD? - Let’s say if you are choosing the Legacy brand, and you want to stick with your amp now - maybe look at the other "XD" model instead, not the SE. The XD version offers an internal subwoofer amplifier to drive the large woofers for you. Your older Plinius 8200 amp would only need to drive the mids/top end driver duty vs all of it. Might be outside of your stated budget, but worth noting in any case.
PS Audio - I have a feeling if you call PS and ask Paul, they are going to want you to buy one of their amps to most effectively drive the FR20s.
After looking over the specs, I’d recommend not considering either speaker brand/model until you try them with your amp first, and then hearing them with a proper amplifier designed to power and control either of these speakers, imo.
Best of luck on the search.