Meshuggah's Destroy Erase Improve has been a recent favourite, and also been getting into Sepultura's earlier stuff, like pre Beneath the Remains. I've been noticing a lot of Sepultura influence in Meshuggah's work.
Oh yeah, DEI is classic, it was my intro to Meshuggah. Everything they do is incredible.
Sepultura's early stuff is also great but I never really thought it might have influenced Meshuggah, though maybe it did.