I'm SoCal, AT180 and HD too. I'm looking at 110, 119, 148 and 61.5. I'm looking at 61.5 for Voom and WCBS-DT from NY. The only thing I've got on 148 I'm looking at is KCBS-DT. I don't subscribe to LA locals but if you plan to subscribe to HD locals you'll probably need 129. I'm also assuming that you are upgrading to one of the new MPEG 4 receivers (622?).
I guess i would ask why not.
If he has 2 dishes before and can live with 2 dishes afterwards, he gets the flexibility of 4 sat locations. Plus if 129 gives him poor reception then he has 61.5 as backup or he can point that dish at 129.