Ok, I definitely have an opinion on this one.
If you can be VERY careful not to get solvents on them, the TRUGLO TFOs are by far the brightest, I would say. However, I have ruined two from letting solvent get on the fibers.
I have (because of that) switched to Meprolights. Meps and Trijicons are both good sights, but they do not transition to all lights as well as the TFOs.
This is assuming you want the standard rear notch/front post configuration. There are some combat speed sights nowadays that get you a better flash picture, while possibly sacrificing some accuracy.
i like my trijjicon's
dragginaknee,
Are you on days or nights? You better get your ass in bed or do some work!