What are your go to LP's for evaluating new gear or new tubes?

I now have about 7 copies in 6 versions.

I've been moving copies/duplicates/versions of various albums down to shelves in the basement to make more room for new LPs upstairs. A nice problem to have!

@dogberry 

I've been doing similarly. Sorting into groups that I am likely to listen to, those that I will never listen to and so on. The biggest part of the collection is probably ones that I used to listen to but grew tired of, or that have too much noise etc. I still need to trim the listening room group since many are duplicates. I have ones that I listen to and others that are just part of the collection and have been replaced by better copies. I keep finding more "audiophile copes" that I wish I'd never bought as they miss half of the music, compared to an original. There was a period when I though these new 180g and 200g copies were better but more times than not, they are not at all. 

I did listen to my Opus 3 records. I appreciate the recordings but it's an odd mix of music. Some I like and some, not so much. One is all in Swedish, female vocalist. My grandparents would probably have appreciated it as they would understand it. :) They are really good recordings.

@inna 

Got the Elend Umbersun cd. Very strange. Gave it to my son. He kind of likes it. 

The Karajan's are almost always good. I have a few.

@sls883 

Picked up an October Project cd, looks to be self titled? I enjoyed it. Have another one on the way. Lots of deep bass and nice dynamics. Thanks.

@billpete Test Record Number One? Yes, it's in Swedish, but he sound is universal. Many years ago I was in contact with Therese Juel, and she sent me her translation of the lyrics:

The phone is calling
I’m chasing out the sound
A voice in my ears says
“Hi – remember me?” 
I hesitate for a start
I’m little bit confused
Next moment I remember
Like a life from the past 
"I’m saying “Hi – hi my old friend"
“Where have you been? It was long time ago!
Hi my old friend” 
We´re sharing our lives
The time is passing by
Cause we haven't met
For many, many years
But I feel we were very close
As close as yesterday
The time is passing by 
And outside my door
the rain is falling down
The time is passing by

I had to doctor her English a bit, as her original made no sense to me.