Are the new Ohm Walsh speakers Audiophile quality?

We would say definitely, YES!

 Good company, good speakers.
they upgrade older speakers, which is awesome.

  They need a lot of moving and trying to find the best position. 
They are a fine speaker. 

Some detracters will say omni directional speakers are just a gimmick. I think its the other way around. I think Ohm speakers are more real sounding and conventional speakers jimmy up the sound.

They are fantastic if you don’t have any choice but to put them next to the front wall or even in the corners.  I’ve had Ohm Walsh 4s for about 5 years, and since I got them I haven’t been curious once about trying different speakers.  I think that’s audiophile if audiophile means listening to and enjoying music instead of wondering if something might image better or whatever.  Recently the audiophiliac described analog as more “dense” than digital, and right away I thought, and Ohms too.

what material are used on Ohm's main drivers?

AFAIK, I think it varies from model to model.  I think my 2000s have an aluminum driver, but it doesn't sound at all like an aluminum driver.  John Strohbeen is a genius.