Wondering about replacing mine on my RIA GI as well.
Can barely see them.
My smith said he'd recommend dovetailing the front and installing my choice of sights.
I've got Meprolights on my Kimber Pro Carry II and Trijicon on my Beretta PX4.
I like them both but with my eyes, I find I prefer the Meprolights. They seem to be brighter, easier for sight aquisition for me in more light levels including total darkness.
Nevertheless, I've been considering just good 3 dot sights as well.
I'm watching this thread....