Which 6sn7 tubes for Rogue Magnum 99


I currently have four EH 6SN7 tubes in the linestage. What tubes are good for this preamp? I thought that only 2 of the 4 tubes really make a difference, but not sure on which ones, front 2 or rear 2. Not looking to spend a fortune on tube rolling.
musky1963
Mark told me if you want more transparency or pop which is what I wanted he said with Sylvania GTB's. He was right and I bought a pair relatively cheap and love them. They were NOS tall boys and talking about dynamics. Lusher sounding tubes would be RCA. The GT and GTA's of the Sylvania family do have a little more sibilance as mentioned above but are smooth and detailed.
The NOS Sylvania GTA and GTB tubes that I had in my system were indeed smooth and detailed as Samzx12 described and are absolutely a great tube. I think the sibilance part is going to be system (and preference) dependent. In my system, it was too much for me, but as I mentioned above, another guy in the shop loved them as they transmitted more air and detail through his system than ever before.
Here's a list of what are considered the best of the 6SN7 family, and what you can expect, with regards their presentation: (http://www.tubeseller.com/ratings.php)