Wow, thanks a lot guys...good stuff.
Sounds like I'll be getting the most 'bang for my buck' to just use the HD7697 fixed at 3 degree magnetic compass. That's the plan.
I was a little shocked at the cost of the towers online. I see lots of them locally with antennas or dishes already mounted, but not sure where they're getting them. There must be a local source. I was lucky enough to mention it to someone at work who has 4 sections to spare, so I'm hoping that'll be 40' & I can just use the pole the antenna mounts on for the extra height. Need to check it out.
Thanks again for everything.
Best tech support ever.