The middle to late Metallica CDs are pretty well mastered, with the height of it being the S&M set. Load and Reload are pretty good. I would grab the gold Master of Puppets remaster if I could, but the Ride the Lightning remaster isn't worth it. Basically, Kill 'em All, Ride the Lightning, Justice, and St. Anger don't sound so good (hi-fi speaking), but the rest are pretty good.

I am the Doctor, and THIS... is my SPOON!