Well, if DA isn't all that important, BFR's are a far better gun, more accurate then the Taurus, and more packable. You can check Magnum Research's website, but, they offer long cylinder .500 S&W, and, a bunch of rifle calibers, with more energy, in .458.
They also offer .475 Linebaugh in the short cylindered version, and, their guns are tack drivers, and super strong.
http://www.magnumresearch.com/Expand...Code=BFR500SW7
http://www.magnumresearch.com/Expand...ode=BFR480-475
Their grips are excellent, and, since they are the same frame as Ruger's, they have a ton of options the other guns don't. Plus, they are made from VERY strong stainless. Sort of the poor man's Freedom Arms.
S