Looking good Matt!
I have a couple of pairs of Filson's safari cloth poplin trousers as well as a shirt. I also recently added some of their feather cloth short sleeve shirts to the wardrobe, just the job for the hot, humid weather beginning to rear it's ugly head here in Texas. I also have an older pattern Filson bush jacket that I like a lot. Add a plain brown leather belt, my Courtney kudu skin suede "vellies" or my Aldens, an Akubra slouch hat with a proper British center crease and I'm good to go. I also have a Tilley T3 for when the weather gets really hot.
I've also have a pair of Orvis desert boots, but I never wear them around here for fear the light colored crepe rubber soles will get blackened from all the city soot. I'm saving those for trips into the desert southwest where the dirt is, well, desert colored.
I've got a couple of pith helmets as well. A Repro Wolesley from WPG, and a more traditionally shaped one made in Zimbabwe, but those are more for "fancy dress" than for real use. I've also got a repro Foreign Service helmet, like the ones worn in "Zulu," but that one is really just a costume piece that I bought to wear in a theatrical production I was in a couple of years ago.