That is a tough set of criteria, My first recomendation would be the Ruger P95, it is not slender or light, but it is a very reliable, accurate, and shootable option. I still CCW mine pretty often. I carried it exclusively for over a year, and loved every minute of it. I also owned and enjoyed an absolutely trouble free Taurus PT111, it was accurate, concealable, and 100% reliable, until I shot the recoil spring about a milion miles while cleaning on an outdoor range, and had nothing but trouble for the next 9 weeks until Taurus finaly sent me the right spring, I then traded the PT111 with 1500 flawless rounds on it for a Glock 23, which I now carry and love. The PT11 may fit the bill for what you are looking for, and don't worry about all the problems the early models had, other than a crappy trigger, all of the new ones seem to be doing pretty well. For Under $350, you will be hard pressed to do better, unless you can find an LE trade in G19, or Sig 229. Good luck!