Hardcore music you need to own

The list author says:
	"Pre-Rollins Black Flag - Angry, unstable, essential."

The list author says:
	"The best album from the Hank era - a classic."

The list author says:
	"The original Straight Edge. A whole discog on 1 CD!"

The list author says:
	"Not quite a 'Best Of' but a good primer. The most influencial HC band."

The list author says:
	"The first & best Fugazi EPs combined."

The list author says:
	"Classic LA HC featuring the original Black Flag front man."

The list author says:
	"One of two essential Bad Brains albums....."

The list author says:
	"This being the other."

The list author says:
	"Awesome 2nd generation NYHC."

The list author says:
	"My favourite album from NYHC originals."

The list author says:
	"HEAVY"

The list author says:
	"It's hardcore...but not as we know it.  If you want to hear something more progressive & punk in attitude (if not always in sound), check this."

The list author says:
	"An essential - and cheap! - primer for those new to the genre.  Check out the book of the same name also."