@Greeno
Hellhammer is on CD as I only buy those anymore. I sold almost all of my vinyl collection. I know, that makes almost an alien out of me, especially in the Old School section but except for the bigger covers I dont like vinyl that much. Mostly because I really hate it when an album I love and therefore play often starts crackling like a campfire after some time. And yes, its bad as hell but I have a soft spot for sucky productions and sloppy Black/Thrash Metal like the mid-80s Bathory, Sodom & Celtic Frost.
The Omen 20th anniversary edition is well worth the money. In fact, it was cheaper than the Mercyful Fate disc and comes with bonus tracks and a live gig on DVD. Extra tracks are Torture Me and live versions of Termination, Battle Cry and an AC/DC cover of Whole Lotta Rosie. I came across it quite accidentally but as I had never heard a single song by them before that and always wanted to check them out I couldnt pass on it. The sound quality of the DVD is not that good but its much fun to watch the boys making fools out of themselves with their hilarious stage outfits and their battleaxes. Embarrassing!
@Greeno & TVF
The track list for the Anthrax bonus disc: Safe Home (Radio Edit), Grunt & Click, Dethroned Emperor, Celebrated Summer, Watchin' You, Auf Wiedersehen, Cowboy Song, London
Somewhere I read that it is basically just a compilation of Japanese bonus tracks and b sides. The two cover tunes are cool and Im glad to have that disc but the real thing happens on the actual album, thats for sure! Believe it or not but this is my first Anthrax album in 13 years. I was a big fan in the late 80s but when Joey had to leave I thought the magic was gone. I remember getting the Only single the day of its release which was actually a few weeks before the album. Didnt like that one very much and therefore considered the band as dead.
@baldyboy
Say, do you have a release date yet?
You should let it grow long and flip it to one side .... kinda like a VoiVod look. 
