Considering 4 12AX7 Tube Types

Hello,
I typically stick with NOS tubes but have decided to try some new production tubes for a change. To be used in a Ming Da tube preamp modded by Response Audio - Vcaps.... Hoping to warm up the mids a bit without making the upper treble harsh, bright. I checked out websites - Doug and Cryoset.

Considering the following
1) Voshod Sunrise 12AX7VKA
2) TAD 7025 WA High Grade
3) Ruby 12AX7AC5 HG
4) Ruby 12AX7AC7 HG

Can anyone comments on their experiences with any of the above tubes?

Thank!!!!!