I would personally go with the Redhawk over the Taurus. It is an established design with who knows how many examples in the hands of shooters. The Taurus, while seemingly a good gun, is much newer and less proven.
Another option, if you're willing to look some, would be a Colt Anaconda. Of the three that would be my choice, in .44 Magnum, with the 4" barrel. A bit handier to carry than the Redhawk yet still quite strong.