Glad you are enjoying it the S7. Craig comes from the pro audio world of UREI / JBL, so most of his stuff doesn't sound as colored as other tube amps. As you said, you can throw whatever music you have at it. You'll have plenty of fun rolling different 6SN7 or 7N7 tubes.
The Vintage Moth 2A3 is really nice. It's better in some ways to the current EC stuff.