Depending on the rest of the setup (speakers etc), TFK ECC801S, Valvo 6201 Blue labels, Siemens E81CC triple micas (may be a little too energetic depending on the speakers), Sylvainia GB 6201 - two or three mica (IMO three mica sounds a bit nicer).
Highly system dependent as I would hope the reviewer knows, although even I will admit the FetValve design shows less of a hot-cold change with tubes, compared to other tube amp designs. Still, different tubes will make a change which may be important to some listeners.
My personal choice with full frequency standard driver (cone, dome) speakers is the TFK 801S and the Valvo 6201 Blues - although since the Blues are pretty much unobtainium he/she should go for the TFKs first. In my system the TFKs provide the right compromise between transparency, extension, soundstage size, depth, and musical smootness. If the reviewer's speakers are a bit zippy or thin, the Sylvania 12AT7WA triple mica black plates might be better. Affordable too. If the speakers are a bit mellow and slow, I'd go with the Siemens E81CC.
The Sylvania GB 6201 is a fine all around choice.