My SR009 with 007t/ii amp with RCA 6cg7 tubes is awesome to me, even the bass is very fine. A super-amp is nice, but not necessary by any means.
HD800 actually seems to need more high-end-amp support to sound great (mine do), but still not in SR009 territory in terms of resolution, smoothness, and speed.
I'm leaning towards this exact combination at the moment (SR-009 + 007tII). And I have yet to read complaints from any of its owners. However, Tyll has this to say: "The problem with this amp is all that goodness goes out the window when turned up to stronger listening levels. The bass doesn't seem to get louder, just woollier, and the mids start to get shouty. But the worst thing is that the somewhat innocuous treble sparkle quickly grew through glare and on into what sounds like significant distortion to me." Now, just how hard is Tyll actually pushing this amp before experiencing such a deterioration in sound quality? What does "stronger listening levels" mean? Are we talking ear-splitting rock concert levels? I'd like to hear from some owners. Has anyone encountered what Tyll describes?