Hi Kip,
I used JJ tubes and Gold Lion . The JJ's made a huge improvent in my system, but one of the tube unfortunately broke. The glass of the JJ tubes is thick and I had the impression that microphonics where less then with the stock tubes. The choise of tubes depents on your system and room acoustic. I tried Full music tubes, but that didn't work.
My advice would be the JJ tubes and spent the rest of your budget on some nice coupling capacitors. Playing with 1uF Jupiter capacitiors now, they sound great!
Good luck with your choise,
Jeroen