Rogue Audio Metis owners what tubes are you using?

The pre came with EH's. I have been using a pair of Sylvania gtb's with yellow print on the base. Just wondering what other Metis owners are using.
Hi Metis owners. I'm thinking about getting some RCA or GE's to try. Any other suggestions? What have you guys tried and liked. Or didn't like.
I used to own a Metis. Call Rogue, they'll offer suggestions. FWIW I really liked the Sylvania chrome tops I picked up here on auction for $50. Better IMO then the GE's that Rogue suggested (and I bought).
I know it has been a year, but I tried a Metis and really liked it using Tung-sol tubes. I am trying to decide if it is the right choice for me, vs Metis Magnum, Perseus, or 99 Magnum.