Sorry. Been tied up for a few days (7th anniversary yesterday).
The list below isn't quite a 'dirgey' as Meshuggah, but are well worth seeking out....
Diesel Machine - Torture Test. (Pantera-ish. Guitarist Pat Lachman became the singer in 'Damageplan')
Fear Factory - Demanufacture & Obsolete. (Mid - Fast stuff, but not thrash, more controlled, almost industrial. Also sheck out 'Devine Heresy', same guitarist as FF, bit faster again).
Textures - Silhouettes. (awesome technical prog metal)
Opeth - Deliverance & Blackwater Park. (Best. Band. Ever.........)
Hacride - Amoeba. (Strange mix, quite Meshuggah-ish with faster bits)
Skinlab - Disembody: The New Flesh.
Gojira - From Mars To Sirius & The Way Of All Flesh (Meshuggah guitarist Marten Hagstrom's personal fave of the new wave of metal bands, and one of my faves too. Mix of stuff, fast and slow)
Don't forget Meshuggah's own 'Catch 33'. Their other albums 'I', 'Obzen' & 'Chaosphere' are all a bit faster than 'Catch 33' (& 'Nothing').
For slow, down-tuned stuff, you've really gotta try Neurosis. 'Through Silver In Blood' & 'Times Of Grace' are my personal faves.
A/V: Sony KDL-V40A12U & BDP-S350, BT Vision, Onkyo 875, B&W MT-30 7.1, QED A/V cables, R.A power cables
Hi-Fi: Arcam A85 & CD192, B&W 602S3 (& the PV1), Partington stands, Grado SR125, Kimber I/Cs, Rothwells, QED speaker cables, R.A power cables.