I believe that in the $600 to $1,000 range you can get any number of guns that are just as reliable as a $1,500 to $2,500 gun. Who can fault any major manufacturer carry style gun (standard model or custom shop/performance center). Remember that you are not shooting 50 yard bullseye here. You are point shooting at a 12" x 18" torso from no more than ten yards.
My two favorite carry guns are a S&W hammerless J frame and a Gov't model 1911. For less than $3,000 I can have two of each, shoot and practice with them on a regular basis and have a back up of each as they go in for regular maintenance. My 1911's have both been rotated through the factory shop after approx. 10,000 rounds through one and 8,000 through the other. Even with the turn around time I still always had one with me.
My advice is that while I believe in buying the best I can afford, the best tool for a carry gun is not the most expensive. A $500 gun that you shoot weekly will hit the target far better than the $2,000 gun that you clean weekly. Buy reliable and spend the excess on practice ammo!