Action Jesus wrotenoodles wroteAction Jesus wroteCoprofago sounds pretty progressive to me. Sounds like a much more jazzy Meshuggah with a lot more melody.
speaking of Meshuggah, they're pretty great too.
The only thing "progressive" they've done is Catch 33. Besides that, they are just an excellent tech death band with a pretty unique sound.
Yeah, and it was easily the best thing they ever released.
I'll say Akercocke in spite of everyone here hating them as far as I can remember. I still say they are easily one of the best progressive extreme bands around. Red Harvest might also be considered, though not typically "prog" if you're just looking for neoproggery. Gonin-ish, from Japan, is definitely something to check out though it certainly isn't for everyone.
If you really like Opeth there's always Farmakon, but I can't say anything for the quality myself.