Some more notes of recent hunting:

Iron Maiden - Number of the Beast (original US press).  Wow, just wow.  I had a UK original press CD of this album that is supposedly very good. I was honestly never impressed with this album as it always sounded pretty thin to my ears (super flat mastering?); that was until I heard this on original US "wally" pressing.  Even on my modest rig!!  Don't even have to crank it to appreciate it but still retains fantastic dynamic range.  NoTB is now my top IM album.

King Crimson - In the Court + Islands (200 gram).  I've determined I prefer the KC jazzy sound and these digitally sourced reissues are really nice albiet a bit pricey.    The old Atlantic label KC albums I have heard are cut terribly or something, they all exhibit surface noise which somewhat ruins the experience, these new reissues definitely solve this issue.  I know there are "pink label" originals that are supposedly the best but seem quite rare and even more expensive.  I will also admit comparing to my FLAC rips the digital files do sound excellent as well.

Slayer - Reign in Blood (2013 reissue).  When I first heard Slayer RiB it was on CD and I fell in love instantly.  Hearing this reissue really rekindled that love.  Another great release, I am not sure who cut these or mastered them.  I picked up South of Heaven, hopefully it's another knockout!

Tool - Undertow (Non original current pressing, 2LP Volcano).  This album is quite cheap around $17 and is an OK pickup considering.  The original CD did not sound that great but the music is just fantastic.  On vinyl it is clearly better sounding and less harsh but after going through two copies I found that the pressing quality isn't that great, a little on the noisy side and you can expect imperfections out the packaging.  Really sucks Lateralus is currently only available via retail on super expensive picture disc.

Also to update from my previous posts.

NIN - Pretty Hate Machine (Non-remastered current release).  Even after professional cleaning this one is still pretty noisy.  I'd say this one is a pass, wish I could find an original.  At least I have the non remastered CD version.

Miles Davis - Kind of Blue (Mono non RSD, 2014).  After getting a replacement from the store this album is currently the definitive version of KoB for me!  It's worth having a stereo and a mono version, you will hear the differences pretty easily.