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

Sea Change by Beck is a beautiful recording.

Masterpieces by Duke Ellington.  The acoustic instruments really shine on tubes.

vetsc5

I'm pretty sure I have the Saint Saens in my organ collection. I probably have 100 or so pipe organ LP's. The Crystal Clear Virgil Fox recordings also reach 16hz. My speakers do 18 but I'm good with that. Pipe organ sounds pretty dang real to me. I'll have to hunt for the one you mention. I am fairly certain that I have it.

I also have a group of Zubin Mehta but not sure if I have the one you spoke of. I always watched for him on LP's when I'd be hunting the bins at thrift shops. I used to find sealed 30 and 40 year old records for $2. I always checked the open ones and if they looked like they had been played or abused, put em back. It would take me awhile but was usually worth the effort. 

dogberry

I'll have to watch for Opus 3's. I'm not sure I have any but I might. I have a fairly extensive collection and I often find things that I don't recall even buying. Getting old has it's advantages as well as disadvantages. :)

rauliruegas

I'm quite sure I have that recording. I have several Sheffields. It would be a good one to check certain things. Thanks for reminding me of it.