No accounting for taste, huh?
I'd take my 1006 over my G20 any day and twice on Sunday.
The 4506 may not be a competitor in the plastic fantastic age with it's 2.5 lb weight, 8 round mag and lack of pic rail, but a more solid, robust .45 ACP there is not. It's about the only .45 ACP pistol which can run 45 Super bone stock indefinitely. My RP45 is the nightstand gun over my 4506 only because if I ever have to use deadly force to defend my family, I'd rather a $300 modern, soulless plastic gun be abused or shoved around on a shelf during any kind of investigation than a nice piece like the 4506.