I'm looking for cleanly produced modern death/grind with some subtle experimentation. By subtle, I mean they can screw around while still making a ripping, good song. An example similar to what I'm looking for is Napalm Death. They know how to throw their avant influences in to a song while still making something very head bang friendly. Anything like that?

Cattle Decapitation is all you need.

http://www.youtube.com/watch?v=EfMPdjfdEM4

Commit Suicide: http://www.youtube.com/watch?v=Jm95qhQNYZ8

Antigama: http://www.youtube.com/watch?v=eVcdw2_4HcY

Biolich: http://www.youtube.com/watch?v=JwP-n4xrmu0

Rise of Caligula: http://www.youtube.com/watch?v=HyLVU_8h4q8

Humanity Falls: http://www.youtube.com/watch?v=eS34lx3l6OI
(this one doesn't have clean production, but I think it is what you are looking for stylistically)

Sulaco: http://www.youtube.com/watch?v=DxVvXlcY_7o

This.

And maybe Pig Destroyer.

These are all good recs.

Cephalic Carnage - http://www.youtube.com/watch?v=tDc_AAnhTnY

Try an older band : misery index

Btw, cattle decap n cepalic carnage sound NOTHING like modern napalm death

Contrastic: http://www.youtube.com/watch?v=TEyYUMjQSQY

You could also try Four Seats for Invalides if the above band made you decide that Czechgrind is your thing: http://www.youtube.com/watch?v=DxtBeuHsumU