I've been looking at some recently available facts concerning the SR-1 Sherwood. Apparently, this is the best regulator in the world. I mean, the performance levels reported by Scubalab are almost unbelievable. Furthermore, looking at the overall design it is just exceptional. I can't say enough positive stuff about the internal engineering, at least as it exists on paper. However, there were some manufacturing flaws with the first batch of SR-1 regulators. If these have been ironed out then I don't see any other reg beating this one out, especially at the discount price of about $470.
So, while I don't believe that the OP's problem stems from actual regulator performance issues, there have been so many people coming here to brag on various regulators I am adding my two cents. Who knows, if the wife is actually an equipment wonk and knows what she is talking about then the Sherwood should be an easy sell.