After getting used to the Heinie Straight Eight Trijicon night sights on my PT1911 (apparently it was a factory option when the previous owner bought the gun in 2007 because it is indicated at the end of the model number:
1-191101NS), I would love to get a set to put on my STI Spartan III also. I think they work great as a general use sight, and man are they bright. I switch between the two 1911s as my daily carry gun, so I'd like to have night sights on both. But, my goodness they're pricey!

They probably aren't actually that expensive when compared to other night sights, but they're a little rich for my blood right now. I guess I'll have to wait a few years before I can scrape the cash together to make it happen.