This may be a surpising pick, but.....
XD-40 is my pick. No, its not super expensive, but it is first rate quality. I'd be willing to bet the XD would shoot right along with the Sig's and HK's at the range. Based on my experience with my XD-40, its a rock solid, accurate, dependable gun. I'd buy 3 or 4 cases of ammo with the money that is left over.