Donnwags,
If you want to give the Fs a go and keep the investment minimal up front, you might pick up a used Musical Fidelity A3CR like I did for $600-$700 and give it a go.
From there, three things could likely happen:
1) you're satisfied with what you hear and are done
2) you get the improvement you're looking for but want to go louder. Then you could sell the A3CR and get something similar but with more power, like a more powerful MF or a more powerful class D amp, without taking much if any loss
3) you're not getting any closer to what you are looking for. In this case either sell the Fs or replace them or upgrade them via Ohm and keep the A3CR. You have a lot of fantastic options with speakers using this amp.
If you want to give the Fs a go and keep the investment minimal up front, you might pick up a used Musical Fidelity A3CR like I did for $600-$700 and give it a go.
From there, three things could likely happen:
1) you're satisfied with what you hear and are done
2) you get the improvement you're looking for but want to go louder. Then you could sell the A3CR and get something similar but with more power, like a more powerful MF or a more powerful class D amp, without taking much if any loss
3) you're not getting any closer to what you are looking for. In this case either sell the Fs or replace them or upgrade them via Ohm and keep the A3CR. You have a lot of fantastic options with speakers using this amp.