I run the factory glass windshield and have a full safety glass rear window i built and installed.
As for heat, you will have to find ways to block off all the holes ect. that let the hot air in to the cab area.
I have made and installed side wing deflectors that are adjustable to direct as much or little air as needed and where I want it to keep me comfortable. I ran all last summer here in Arizona with this setup and was very happy with it.
As for dust, if you run a full windshield you have to have some kind of rear window and you will still get a little dust but not to bad.
With the side wind deflectors I can pretty much control the dust also.
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