Dave,
We are in exactly the same situation. We live in a co-op and wanted a dish. Although our patio faces southwest, we decided to try the dish indoors (so we wouldn't have to worry about grounding it.) It is behind a full length glass window (the side of the sliding glass door). We get 60-70% signal which is fine. Sometimes it even goes down to 40% which is still good.

We even have vertical blinds infront of the window,and as long as there is some opening, it works. Also the window gets pretty diry with no negative effect. The only time the signal is interrupted is if someone is out on the patio and stands infront of the dish.

We are relocating to Atlanta and our first priority is to have dish access!!!

Bet