I'm kind of in the same boat. Except I'm gonna sell my WH20 and get one of these.
Really want AC/DC, but seeing Stern do stuff like reduce the size of the subwoofer makes me hesitate on the Vault. Oh, and it's been a month since I reported to Stern that my SW is ghosting all over the place and they STILL have not responded to my distro.
Really want DI but so expensive!!!