I've got to give it to Kill 'Em All. Like the others it has this nice raw unadorned NWOBHM vibe coupled with that youthful energy rush as well. Personally I now detest Slayer. They always seemed like a bunch of rednecks posing as a metal band. However I used to like Hell Awaits a lot. Moreso than Reign In Blood which I feel is way too overrated. I haven't heard Fistfull Of Metal. I know, I should be ashamed right?
I was never a huge Megadeth fan. Anyone ever notice how the early albums have that total early 80s 'drenched in reverb' sound? I really dig that.