I'm gonna go against the flow and say Tool's Lateralus sounds much better than 10k Days to me. The tones of the instruments are just so much more interesting on Lateralus. They sound like vibrant green and purple, while 10k Days always sounds more like a duller brown and red to me.
Aside from that, here's a short list of my other favorite sounding records:
Creed - Full Circle
I don't really like Creed, but this album sounds massive. I love everything about the way it was produced, and IMO totally kicks Load/Reload out of the ballpark as far as rock productions go.
Devin Townsend - Ki
I know it's not metal, but there's something about the way this thing was recorded that really sounds incredibly full, warm and organic.
Strapping Young Lad - Alien
Favorite metal drum tone, hands down. I'm also a sucker for that hyper-compressed layered sound, and this one just goes above and beyond with it.
Morcheeba - Big Calm & Gorillaz - Demon Days
I love everything about these albums. If I ever produce a pop album, these are going to be my main references because I think they have the perfect balance between the vocals and the instruments.