I've asked Egan more questions than I think he's wanted to answer about this record, as I too think that it has the best guitar tone I've ever heard.
The drum tones are amazing, too, as well as bass, vocal, and acoustic... overall I think this is one of the best productions I've ever heard.
Writing wise... absolutely perfect. Seriously - everytime it rains, I just throw it on and sit back and soak it all in. Listening to Daylight Dies is probably the most cathartic experience I've ever had.
The gats were 2 tracks 5150II and 2 tracks XXX, both running into a Peavey Sheffield cabinet (one of those ones with the metal grill and the red magnet logo at the bottom). Mics were SM57 and e609 silver in the Fredman positions, the e609 being the one at a 45º angle. Those went into a Digimax FS, and then via lightpipe into an 002R.
The guitar itself was an LTD of somesort (Egan couldn't remember the exact model), Strat shaped, 81/85 set. No tubescreamer.
The cab was in an iso box they built, measuring roughly 4x11x7 (HxW

), and then placed on an Auralex Great Gramma pad. I recently picked up one of those pads and can say that I'd highly recommend it - it tightens up the bass response really, really well. The cab was firing at a wall of foam, and every surface of the isobox was covered in some kind of absorptive material.
The bass was one of Egans custom Roscoe 5 strings with Bartolini pickups, split into a Sansamp Bass Driver and then into his Aguilar bass head, which was used as another 'giant' DI.
That should be about it for the gats/bass.