Opera Cyber 222 uses 4 6SN7 and a 5A4R rectifier, really nice at under $2k, would also second the Melody, I've heard it a few times at friend's places and it impresses big time. The finest tube pre out of China would have to include the ShengYa CS-6, which uses 4 6922's per channel, under $5K. A new more expensive tube pre is in the works from Jungson, saw and heard the prototype last year, probably be $10K+.
Cheers,
Ian