Firstwatt to drive Focal aria 948

So, i've just picked up some focal aria 948 speakers as I got them half price.

But I currently have an aleph j am which I'm told wont drive them very well due to it dipping down to 2.5Ohm impedance between 70-100Hz while being a 8ohm speaker.

I was recommended to build a push pull amp when asking about the aleph j.
To which I was thinking an F4/BA3 and was told that this should be able to handle it.

But i'm just posting to see if anyone things one of the other firstwatt amps like the F5, F6 or M2 would do a better job