I carry a Streamlight ProTac 1AA everyday and love it. It has high, strobe, and low settings and a great battery life. Plus it's a AA battery so its cheaper than a 123A...
I have the LW Champion Operator and they are phenomonal pistols! I'm a huge SA fan and am debating on getting another Champion Operator and getting Duracoated in FDE or Coyote Tan or getting a TRP....