@tomic601 I think I'm going to keep using the Nova for the SL 1200. Now that I have some headshells to play with, I have one with a MM, one with a LOMC, and one with a HOMC. The Nova has more gain settings than the Chinook and they are much easier to get to.
I put the "new" tubes (6DJ8 / ECC88 Telefunken West Germany with diamond mark) in yesterday. They sound good, but I don't notice a dramatic difference other than that the old tubes were starting to sound a little noisy.
I started listening to Santana Abraxas and fell asleep...