Best Tubes for Rogue Audio Sphinx V3 Magnum

I purchased a used Rogue Audio Sphinx 3 Magnum at good price that came with 5 extra sets of 12AU7 tubes. The previous owner installed thumbscrews into the unit to make it easier to roll tubes.. This is my first foray into tubes and the integrated sounds great with my Orchard Audio PecanPi+ streamer and Goldenear Triton 7 speakers.  The sound is a massive improvement over my old Rotel RA 1570 Integrated.
The unit currently has a pair of NOS Bugle Boy tubes installed.  I also have set of the OEM JJ tubes that came with the amp along with NOS Mullard, Telefunken, and RCA Clear tubes.   There is also a set of new Genelex Gold Lion tubes.

For those of you that are familiar with tubes, which pair would you recommend to try first?  I would also be interested in these tubes in general.
Thanks for you input.