Recently stumbled across this amp project on KickStarter, thought I'd share:
$400 for a custom built head seems like a pretty good deal to me. I'm already in for the head, but for a little under $600, you can get a matching speaker cabinet too if you want. 12AX7 premap tubes, EL84 power tubes, 2 independent channels and an effects loop as well, definelly not too shabby... Theres a video clip up on the page if you weant to see how it sounds. Really hoping it gets funded!