Is there an advantage in being in Denver and already being up high?
I wondered that myself , like if I live in the Sears Tower and had my FTA DISH on the Top Floor , How many more degrees of LOS would I have ?
Well 1st I don't think living in Mile HIgh Colorado will help at all , it's a drop in the bucket to compare that with the 22,000 miles away you are from the Clarke Belt.
I would think if you live on a mountain top with good LOS of the southern sky that you could gain some LOS on satellites that are at a low elevation, but thats about it , but would could be gained from Colorado , if you can get PAS 9 (Intelsat 9)58.0 West , your next sat to the East would be Intelsat 3R at 43.0 West ( It's Possible ?) , that's a big difference , and quite a stretch , so I believe the answer to your query is NO , nothing gained from living in Colorado.
Much more gained from if you can actually see Horizon to Horizon. meaning no obstructive view of the Southeast sky , no trees , buildings , Geographically no hills.
As for gain on strength of signal , I would say insignificant .