What time of year (early fall, late fall, or winter) and what terrain (mountains or prairies)? Those are all decisions to think about when looking for boots out here. Will you need heavier insulation (800+) or will you be ok with no insulation?
For pretty most all of my spring, summer, and early fall hiking in all terrains here in AZ, I end up wearing my White's Smokejumper fire boots. They are custom made for my feet and are the most comfortable boots I've ever worn. Of course, I could justify $400 custom boots because of my time on the fireline out here. If not for that, I wouldn't own them and could never justify them. When it gets cold, I typically switch to my insulated Danners (Pronghorns) if I'm doing spot/stalk hunting or snowshoeing, although I don't care for them anymore and end up wearing a pair of 200 g insulated military boots my brother-in-law gave me. My next pair of insulated boots will probably be Danner Canadians or Danner Trophys, although I'm extremely tempted by Kenetrek boots. I know several people that use them now and have nothing but good to say about them for comfort in steep mountains and good, sturdy gripping and support. I also know lots of guys out here use the light weight Danner hiking boots for early season hunts b/c they are light weight, very comfortable, and have good traction. Before I got my White's, all I wore was Danners.
Bottom line, look at the season and terrain you will be in, but you can't go wrong with Danner boots or Kenetrek boots. Both have great support, great soles, are comfortable for all day hiking (with heavy loads) and both are made in the USA. Just like good glass, don't skimp with $$ on boots if you are heading out here (western states, not just AZ). Good glass is great for seeing your quarry or the sites, but comfy, durable boots will keep you out all day, multiple days in a row. And invest in Smartwool hiking/hunting socks with good liner socks (Smartwool or other synthetic liners). That, in combination with good boots, will keep your feet happy and healthy all day!