I'm continuing to use the LCD-2.. and it's impressing me (more) with every passing hour of use. The Ember is a wonderful match w/ it, btw. It isn't a 'tube-y' sounding hybrid, either.. it's just very clean and transparent to the tube used. An hour or so ago, I rolled in a USA-made Amperex PQ 6922 w/ a "D-Getter" (it's said this tube comes fairly close to approximating the sound of the famed/obscenely expensive/practically extinct/holy grail of tubes, the 'pinched waist'). Anyways, I hooked up the LCD-2.. and oh my goodness.. I was stunned with the sound flowing into my ears. I'm tempted to get my hands on a relatively inexpensive SS desktop amp (an Audio-GD amp, perhaps?) out of curiosity and see how the LCD-2 likes that.
Back to the 650/Crack: my SB'ed Crack isn't stock.. the output caps are film caps, and the last PS cap is bypassed with an AuriCap. Also, I have an Alps Blue Velvet pot.