I support the opinion of Rgurney. I started a similar thread a couple weeks ago in this section simply titled "6H30" if you want to refer to that. I am going to be picking up 2 pairs of the 6H30-DR tube for my VK-31SE from Conus Audio (highly recommended). It is to my understanding that BAT no longer uses the NOS 6H30 in any of their pre-amps with the exception of the $18K Rex. You can purchase the NOS tube (considered to be the nes plus ulta of the 6H30) from BAT for approx $300/each!. Since your pre requires 6 tubes, that would be quite a financial committment.