I'm very interested in the Valhalla 2 as well.
I've heard some say it has less of a tube sound than the original, which would actually be a tad disappointing. Is there any truth to that?
And, for the record, I'm actually FAR more interested in the 400i than I am in the 560. Partially because I might actually be able to afford them, and also because I dug the HE-500 sound so much.