Dio Vinyl collection / underground top 20

Hey folks,

this is the storage for my vinyl records. As you may see, this place is a mess. At the moment I'm writing my B.A. thesis at the university, so sometimes I need to do something to free my mind - by reordering my records.
I thought this would be a nice reason to make some uploads here. Recently I enjoyed very much talking about music here when some guys came up with posting youtube links with their records or patches, so i'll do the same.
I thought of posting a top 20 of my "underground" vinyls here. I don't want to start a bitchfight here about "what's the best Judas Priest album?" or whatever, and maybe someone finds out about some cool stuff he did not know about before.
Due to a lot re-issued albums and re-issued it's kinda hard to define what's still "underground", and I guess at this special place most of it is well known anyway. Anyway, I had to draw the line somewhere.
For me, this is a nice way to listen through my whole collection again. I will also drop a few words to every record I'm posting. I guess, I will post like one record every day, so stay tuned if you are interested.
In case someone wants to start a guessing game, it's necessary to draw a line defining what is not "underground" anymore. In a following picture I will show a few records which will be not on the list, because I consider them as rather well known.

Of course, I will only post stuff that I really have on vinyl, so some stuff I love, but just have on CD, will not be uploaded. Also I will post only 1 album each group to make it a little more interesting.

Genres I will pick from are mostly 80s heavy/speed/thrash metal! This is no offense, but the underground blackthrash stuff I own is mostly on tape :P

The first record, "my #20", will be shown in a few hours.