Which would you choose of the three? (If you would rather use the Deagle or Magnum, just pick one of these below, or don't post just to raise your post count.)
USP : The USP (Universale Selbstladepistole or "universal self-loading pistol") is a semi-automatic pistol developed in Germany by Heckler & Koch GmbH (H&K) of Oberndorf am Neckar as a replacement for the P7 series of handguns.
M1911 : The M1911 is a single-action, semi-automatic, magazine-fed, recoil-operated handgun chambered for the .45 ACP cartridge. It was designed by John M. Browning, and was the standard-issue side arm for the United States armed forces from 1911 to 1985, and is still carried by some U.S. forces. It was widely used in World War I, World War II, the Korean War, and the Vietnam War. Its formal designation as of 1940 was Automatic Pistol, Caliber .45, M1911 for the original Model of 1911 or Automatic Pistol, Caliber .45, M1911A1 for the M1911A1, adopted in 1924. The designation changed to Pistol, Caliber .45, Automatic, M1911A1 in the Vietnam era. In total, the United States procured around 2.7 million M1911 and M1911A1 pistols during its service life. The M1911 is the most well-known of John Browning's designs to use the short recoil principle in its basic design. Besides the pistol being widely copied itself, this operating system rose to become the pre-eminent type of the 20th century and of nearly all modern centerfire pistols. It is popular with civilian shooters in competitive events such as IDPA and IPSC shooting.
M9: The M9 pistol, formally Pistol, Semiautomatic, 9mm, M9, is a 9x19mm Parabellum pistol of the United States military adopted in the 1980s. It is basically a military specification Beretta 92F, later the 92FS.It won a competition in the 1980s to replace the M1911A1 as the primary handgun of the U.S. military, beating out many other contenders. It officially entered service in 1990. Some other models have been adopted to a lesser extent, namely the M11 pistol, and older, or different, models remain in use in certain niches. The M9 was scheduled to be replaced under an Army program, the Future Handgun System (FHS), which was merged with the SOF Combat Pistol program to create the Joint Combat Pistol (JCP). In early 2006, the JCP was renamed Combat Pistol (CP), and the number of pistols to be bought was drastically cut back.