The MP5 is a cool gun, but I'm not entirely sure why I'd fork over $2K+ for a 9mm semiautomatic version that doesn't do a whole lot more than my Glock 34. Or, that's a lot of money for 3 more inches of barrel.
Mike
You really can't compare a pistol to a PCC. Where the PCC's shine is putting shots down range, quickly at further distances. I know I can't shoot my pistol at 25+ yards as fast and accurately as I can with my 9mm AR.