DAMAGEPLAN - New Found Power 
R.I.P. Dimebag
MEGADETH - Countdown to Extinction 
Megadeth at their best IMO.
PANTERA - A Vulgar Display of Power 
Some of Pantera's Best songs are on this album.
Shadows Fall - War Within 
Shadows Fall's best album.
IRON MAIDEN - Best of the Beast 
I couldnt choose just one album from them because there are so many good songs so this is their best and features their best.