noggin Thank you for explaining the possibilities.
I need DVB-S/S2. So the PI TV Hat is not sufficient.
There are a lot of options, but I think I understand them.
For straightforward DVB-S/S2 from a single LNB or simple Diseqc then a SAT>IP server makes a lot of sense, or you may find you can run SAT>IP server software on an Enigma 2-based DVB-S/S2 set top box (ignoring its primary role). These days with FBC tuners giving 8 separate tuners in a single box - it can make a powerful set-up.