Go to Audiotubes. There are detailed descriptions of each tube type you've mentioned. And it is a good source for purchase of NOS tubes.
Check out Fuzz audio. Lots of useful info and tubes for sale.
I would avoid current production tubes except for the Genalex ECC83/B759 (ECC83 is the European name for the 12AX7). This tube is a wonderful all-arounder. Present day tubes are not built to the high standards that the NOS tubes were.
I have rolled many 12AX7 and 6DJ8 tubes in my preamps. Every model has its good and bad features. You have to experiment to discover the best tubes for your particular musical taste. Buy enough to populate the first gain stage for the phono and for the line level stages. These locations have the most effect on sound.

