Trijicon on my work guns since 1992. Too much easier for me to see at low-light quals to even question. HDs most recently even on the off-duty gun.. If I could find something the same size & width/dovetail/looks like HD front sights, I'd have them on the fronts of 1911s I've gravitated to in retirement. Always wanted my 642 milled and set up with the front Big Dot but not sure I can justify the expense any more.