Seven Chalices is definitely well within the upper echelon of death metal from the past decade. It's truly an exceptional work, although I would argue that it's as black metal as it is death metal. Graves of the Archangels, Conjuration of the Spectral Empire, Farseeing the Paranormal Abysm, Death Transmutation, and The Chalices of Ages all belong in the discussion. For Slugathor, I contend that Echoes from Beneath is definitively their best work. I would also like to throw another name out there: Church Bizarre's Sinister Glorification.