[bobnielsen]

The AT-9 is the first-generation 5 LNB dish. The Slimline is a newer model (AU-9) which has all of the LNBs in a single assembly. It is about as wide as the AT-9, but not as tall.

 

[bobnielsen]

You didn't mention which DMA you are in, but here is the list of channels carried on 72.5: http://www.lyngsat.com/packages/directvusa72.html.

If your locals are there you would need to keep the round dish for these. The WB68 multiswitch has a port where these are added to the signals from the main dish.