megadeth rocks man. we have the same music tastes (well from the 4 bands you mentionned).

anyway i love pantera, children of bodom, metallica, hendrix, ACDC, black sabbath, led zep, iron maiden just to tell few

pink floyd: momentary lapse of reason (the album), dark side of the moon, breathe, money, wish you were here

marley: lick samba, easy skanking, jamming, mellow mood, zimbabwe, so much trouble in the world.. more and more lol

megadethL rush in peace(th album) or best of is good. like hangar 18, a tout le monde, holy wars, etc

try liquid tension if you like dream theater