Haha, yeah, I'll keep an eye out to hopefully find a lower price!
In case anyone was wondering, the Ken-Rad round-plate 6F8Gs sound glorious! There is definitely a house sound with Ken-Rad, it's very similar to their 6SN7GT/VT-231 (black and clear glass both sounding the same, as most of you know). Compared to the RCA <1946 6F8G, the Ken-Rads sound cleaner, less bloat (which I love about the RCA for certain music types and classic films), and puts forth supremely resolving mids--if a singer's voice is raspy, you hear all the starts-and-stops in the voice with sharp clarity, whereas the RCA will smudge things and smooth it out a bit. As usual, bass performance is sublime: fast, punchy, deep, and a control to it that is atypical of the "tube" sound. Cheers and happy listening!
EDIT: I should add more...
Transparency is really what I was hinting at when talking about Ken-Rad's mids--the feeling of being in front of the singers is more obvious with Ken-Rads (6F8G and 6SN7GT staggered-plates) than with any of my other tubes, including RCA, Raytheon, Sylvania, National Union, and even the coveted Tung-Sol round-plates (all <1946). The Tung-Sol has a very balanced and natural (many say beguiling or magical) sound that I think wins most people over, but Ken-Rad's upsides (bass and transparency) are definitely more striking, more in your face.
Highs are a bit subdued. For example, when there's a peak in the highs, especially with female vocals, the RCA and Raytheon (flat-plates) reach me and evokes a physiological reaction where I almost get goosebumps...the Ken-Rad sounds clear, clean and nice but don't force that physiological response. Obviously, that physical reaction makes the music more emotional, makes me literally connect with it, feel it...and not merely listen to it.
Those are just some quick impressions, thanks for reading and take care!