Your thoughts on these different tubes?..

I had tubes in the past from VAC, BAT, CJ and others...but have been in the world of solid state as of late.

Thinking about doing a modest system based on a tube integrated and would appreciate hearing your experience with the following tubes:

Output tubes: KT88 vs 6550C vs EL34 vs KT90

Input/Driver tubes:6922 vs. 12AU7 vs. 12AX7 vs. 6SN7

Thanks for any input...and have good holidays..