The Sig 210 is no run of the mill police or military sidearm! The P210 has long been one of the most accurate handguns ever produced. I've seen accurized P210s put ten rounds into a 2" group at 50 yards.
Sig Sauer make fantastic firearms, and plenty of elite police and military units carry them (Dept. Of US homeland security, the JTF2, the Canadian MPs). Many police forces carry the Glock22, or the S&W M&P40- because they're very inexpensive purchased in quantities. Consumers can buy them new for about $550, (in Canada) and police forces pay much less.
I'm a firearms instructor, and while I wouldn't say Sigs are the best, I'm a huge fan of my Sig firearms.