What Preamp Tube Sounds Best

What Preamp Tube Sounds Best
What do you prefer, if any? want me to try another band of tube?
Also, they are not halogen bulbs so you don't need gloves to change them.
Tubes:
1 Stock - ECC-83 (May not be stock but its tube i started with)
2 Generic - 12AX7
3 Ruby - 12AX7
4 Fender - 12AX7
5 Ei - ECC-83
Signal chain, PRS Custom 2, Orange Micro Dark Terrror, Vox 2x12 cabinet
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