I picked up the Ameriglo Hackathorn sights from Bowers for $88 before tax. These have the tritium front with bright orange ring, and all black (no tritium) bladed rear sight. I like this set up quite a bit for a smaller pistol that has potential to go in and out of my pocket from time to time, as they are very low profile, especially the rear sight.
I just put the Trijicon HD's on my G19, and they are awesome (likely my favorite sight to date), but size wise, they stand a bit to tall for the smaller pistol IMO. Plus I think simpler is better on the small 43.