If the question is whether to invest in an Invacom QPH-031.
Today, I'd say, "no".
However, we all have spare LNBFs...
I have six retired circular lnbs that have no value.
So, I don't think I'd go to any more effort than Mike suggests:
...just take a cheap DBS LNBF and attach it left or right of existing Ku LNBF with a hose clamp, making sure the elevation is centered at same level as Ku unit.
The DBS satellites are pretty powerful, so you should have good results.
Now, finding something in the clear, that you actually want to watch, that would be the challenge!
edit:
If you want to go the fixed-dish route, then depending on how many receivers need to get the signal, you could go with Legacy LNBFs and the 4x4, as Iceberg suggested.
Or, if you used DishPro LNBFs (they're bandstacked), you might just run 'em to a diseqc switch.
(or even a DP-34)
If you use a multi-LNB head, they generally respond to simple diseqc commands, but may take more power than a typical FTA receiver is happy to supply.
(...and that would benefit from more discussion)