Another vote for the P7. Though SIG's are still great guns. The P7 does have its limits though. It was intentionally designed as a police gun, and in this, and civilian concealed carry it has no equal IMHO. There's a reason the German's selected it over the other two in their trials. It's gas system and general maintenance requirements preclude it's use as a "kick in the dirt and treat like an AK" handgun.
It's squeeze cocking mechanism gives it a single trigger pull weight, the gas system allows it to have a much smaller slide, and it has a very low bore axis. Very accurate and very reliable to boot. It's is smaller than the SIG despite having a longer barrel. The 225 is 7.1" long, 5.2" high, 1.3" wide, with a 5.7" sight radius. Compared to the P7 which is 6.54" long, 5.0" high, and 1.14" wide, with a 5.83" sight radius. With the same magazine capacity as the SIG 225, it's clear why the Germans chose as they did.
In most trials, the design that is most changed to meet the requirements often wins. Thus the reason the P7M13 lost to the Beretta, and SIG in the Army trials.
-Morgan