I have a couple of nice audio setups, each with it's own HWS. I use a UPS/line conditioner similar to
this one for each setup. Yep, pricey, but well worth it IMHO. I have a lot of equipment plugged into each one. I'm assuming you are plugging in
at least the Hopper and a TV.
Since you have a generator, I suspect you will really benefit from such protection. But if you must go cheap, keep in mind anything less than $100 or so, for your application, will likely be insufficient.
This is also a good one, and I think it's at reduced price now. It won't filter as well, I think, but if you don't have an AV receiver, should work just fine.
I certainly would not go any cheaper than
this one.
Other brands are fine, too.