Thanks, the poor-sounding 33s seems to be the question at hand. I have my handful of 33s with great sound stages released across many decades (1st pressing of But Not for Me comes to mind), even if that's not my system's strong suit. Mastering is the other big consideration, I have some LPs that jump off of the speakers, while you have to crank the volume on others to get them going.
Don't have the technical knowledge to further the conversation, so we wait...