fwiw, part of the reason my Olympica's need more power is because of the large room they are in; my living room is 24' wide (where the speakers sit) and 36' long, with 13' ceilings - certainly not ideal
I position them approx. 15" from the back wall; the left speaker is 3' from a side wall, the right speaker about 5' from it's side wall - sounds like our room configurations are similar as my living room opens up on the right side to a corridor to the front door
I actually had my dealer to my house, 3 states away from his dealership, so he could set up my new TT and cartridge. While visiting, he said the several pair of Olympica III's he sold to other customers sounded plenty impactful in rooms smaller than mine, with amplifiers less powerful than mine. He was especially impressed with their bass response.
All that said, all I can suggest is in a larger room, to get the best from the SF's, try not to under power them - at one point I powered mine with a pair of Bel Canto M1000 class D 500 watt mono amps and they sounded excellent. I wish you the best, these are difficult decisions to make!