I have never used a pistol as my main gun. Ever. Its an awesome gun, i give you that, but when you need to have a long-to-mid range battle it is worth as much as a 203 smoke.
at close range i own with the DE.50 its my favorite handgun and i dont use my DE for a main gun unless im sniping of something and i get bored of PWNIN. yeah the Mark-23 SD owns to SP-10 can EAT **** AND DIE