The original plan was to try to incorporate my existing direct dish to receive GOL and NASA but I have since learned it was not a good candidate for that, and have become interested in receiving much more fta as well.
To try to clear things up a bit. I was thinking of either 1. leaving the dedicated globecast dish up for the Setanta channel and getting a second receiver and motorized dish with the QPH-031 LNBF. (This would allow me to allways have setanta on without regard for what I was doing with the other receiver. I could watch GOLTV on one receiver and Setenta on the Globecst receiver at the same time

and also allow me to watch/scan other satellites such as G10R, etc. I am very interested in purchasing a receiver with blind scan, it looks like that would be half of the fun with these systems.) or 2. Just using one motorized dish with the QPH-031 LNBF and connect both receivers to the same dish. (I will probably will not do that since I already have the globecast dish installed)
I did watch for a used globecast receiver for a few weeks, but the risk with purchasing a used receiver/ dish, shipping from an unkown person without seeing it first did not seem worth it to me. Another factor to consider is that if there is a blance on the smart card you get with a used system you will have to purchase another card for $75 or pay the balance on the used one. As I mentioned I got the $160 receiver and dish package through the setanta promotion.
I also wanted the experience of setting up the non motorized system.
The globecast receiver will do FTA as I mentioned I was able to enter transponder freq, and sr manually to add a few more free channels that were not preprgrammed globecast channels albeit still on IA5.
I did not see anywhere to specify L or R Polarity for circular LNB on the globecast receiver, only H and V for Linear. So I am unsure if I could use the 18" dish / circular lnb even if I wanted to.
Thanks for the suggestions.