I use transmission line speakers rear ported, new production, not a known brand (custom made). They are rather splendid in my opinion for the price point of about $2K (direct selling from the dude who makes them).
96 dB @1w/1m, 26hz - 30khz +/- 2dB.
I didn’t know anything about TM before buying them. There is quite a lot of reading available, some quite technical which is above and beyond that for other configurations.
As to pro/cons - I can hear only pro things, but I’m biased so don’t go there! Enjoy!
[edit - coincidentally, just yesterday I posted a quote from Stereophile which referenced Falcon speakers - that Prima Luna bloke reckoned PL are a good match for Falcons. He sells PL by the thousands, so read into that what you may! ]