. . . The only way I'd consider getting one is if they brought it out in .357 Sig or .40 S&W . . .
Browning beefed up the design when they brought it out in .40 - among other things, I think they added an extra recoil lug to the barrel, so making this new BHP a .40 or .357 Sig would require more than a simple rechambering. In fact, for a while there was a cottage industry in converting the beefed up .40s to 9mm, since some of the practical shooting crowd was enamored of making "9mm Major" pistols for their shooting games, and the stock BHP was considered to be too weak for the required overloads of 9mm Major ammo.
In fact, earlier BHPs were rumored to be "weak" when it came to extensive use, but later BHPs - with cast frames - were said to be stronger. Some sources said the BHP should not be used with "+P" ammo, but there was an article in
American Rifleman (Nov 1989) referencing an internal Browning report that a BHP digested 5000 rounds of Remington "+P+" ammo without issue.