I have the TruGlo Tru-Site Xtreme and absolutely love it. Can get it for under $50 if you shop around.

KEY FEATURES
[ul][*]Adjustable windage & elevation. They even have a tool-less model available.[*]5 very bright and sturdy pins. They even have a TFO 0.019 pin model available.[*]Glow-In-The-Dark shooter ring to help you quickly align with the sight through a peep-sight.[*]Adjustable level that's illuminated by the shooter ring.[*]Extra long and protected fibers that wrap around the outside of the aperture that allows the fibers to gather more light for low-level situations.[*]Optional sight light that instead of shining on the pins causing glare shines on the outside fibers where they go into the pins lighting them up.[/ul]