There's lots of good stuff out there!
Based on my experience with products, I'd recommend the following...
Best: SureFire X300
Next Best: Insight WX150
Best Value: Streamlight TLR-1 C4
AmeriGlo, Trijicon or Meprolight...
Term Limits Are Best For Americans Because: -1) The Best And The Brightest Aren't Getting To Washington! -2) We Currently Have The Best Politicians Money Can Buy! -3) It's The Best Way To Fight Organized Crime!