I would go with what Frank said, the Copper John DeadNuts Hunter is hard to beat!

The Impact Archery sights are very nice! They are probablly the brightest sites that I have ever seen, almost too bright!

Cobra has a few nice models also!

The things that I look for are.... construction, adjustability, and brightness of pins. I prefer a all metal construction. This is much nicer IMO, because you can't strip the screw out when adjusting everything. Also, I look for a single plane, zero pin gap style sight! I have messed around with the staggered pin sights and they can be a pain in the butt! Also, I look for a sight that has alot of adjustment and that can be fine tuned for the best accuracy! Pin brightness is another thing to look at. It isn't nessacary, but a nice bright pin is very nice for shooting in low light conditions!