Spend the money on the S&W!!!!!!
I first purchased a Taurus .45acp tracker revolver, and ended up selling it. That light weight frame couldn't take the .45 loads well, it was brutal on the gun. Everything would come loose when shooting it, the cylinder fell out and all! Taurus quality is poor in my opinion (I have owned 2 of them)
Trust me the S&W is worth the extra $200.
I really wish Ruger would make one, but unfortunately they don't