OH YEAH!! I want one!!! Just a matter of time, and some fun money.
As for which one to get the BFR or the Smith, it would be the Smith hands down. At the last Handgun Hunt shoot I got the chance to shoot both a BFR and a Smith in 500 S&W. The BFR was with 350gr and 500gr loads. It was brutle with both loads. With a firm grip recoil made the gun stand straigt up. The grip was hard and beat your hand. The Smith was loaded with 440gr cast bullets and was very pleasent (easy) to shoot. The grip is very comfortable and recoil was very managable. I shot the BFR 5 times and that was ENOUGH!! I shot the S&W 15 times and could have shot all of Jerrys rounds with no problem.
So you could get the BFR cheaper, but buying an aftermarket grip and having the magna-porting done just to shoot it the price will be the same if not more than the smith. I know which one I will buy when the time comes. Just my two cents worth.