The addition of the Discogs search was what sold me on OCD, as Discogs tends to have entries for most of the obscure vinyl that doesn't come up on Amazon.

I got tired of entering in album titles only to sift through 20 editions to find the right pressing of a particular album, so I tried this:

Click "Add from Discogs" and then go to the "Keywords" field and enter the catalog number as it appears on your LP.

For example, entering "COM 946-S" produces only one result - the original pressing of Dick Hyman's "Age of Electronicus."

I apologize if I'm stating common knowledge, but I think this addresses the problem you posted. Hope it helps!