If you want a .45 DA/SA revolver that can practically shoot any .45 cartridge except the .454 Casull, it's worth it.
If you want the .45 ACP to be super accurate shooting out to 25 to 50 yards, look for a .45 ACP revolver or the Ruger Blackhawk.
I think this Redhawk has so many niche novelties going for it, the Colt/ACP ability, the fact that there are very few .45 Colt's that are double action and have a swing out cylinder, the ability to shoot Ruger only .45 Colt, etc. that it's got a lot going for it to make it worth getting.