For pushing Lot's of air N' .25....Ur Choice: Hugget Astille or Donny FL Sumo?

Between the two you've listed I'd definitely go for the Astille.

It's significantly quieter to my ear (Sumo doesn't actually fare well against most competitors in my opinion) and beautifully machined/constructed.

I had an STO Levitas previously which had significant limitations like absolutely requiring a gun with a big shroud due to its baffle/gas diode position, but was really good if those circumstances were met, especially given its size. I'm sure the newer ones are a big improvement and well worth checking out.

The huma mod40 works great too. Better overall I think than the mod 30.