I fully expect to get killed for saying this given the hatred on this site twoards the Amphora.
I think the RWA pre will be an "adequate" source for the BHSE -> SR-009 whenever they arrive. I'll let you hear it with the Siemens CCA tubes I have in there the next time there is a bay-area meet-up. It sounds quite different from Bobcn's Isabellina. Still, the RWA is no Perfect-Wave. Then again, what is?
Horio and I are talking about working together on building a KGSSHV to drive the SR-009s until the BHSE shows up. I only put down my BHSE deposit a few weeks ago, so I don't expect to see it until the fall. As much fun as it would be for you to have an O2 around as well, unless your BHSE comes early I'd probably just stick with the Lambdas and the 323. I agree though, it might be a long wait.