I have been looking, and seen some of the specifications drop down the list of importance.
A fixed dish with multiple LNBs has only one real advantage, the speed at which you can change channels.
All other considerations (complexity, limitations on positions received, efficiency, price, time to install etc) make a motorised system more suitable for the person who wants to watch everything.
Most importantly there is really no upgrade available with a fixed dish should you find it inadequate, and the resale pricing is almost zero once you look at the costs of dismantling and repackaging to post.
If you can advise what channels you absolutely 'must have', and maybe the languages you can live with/understand then I could recommend some kit.
How many televisions do you want this to provide by the way?