what tv guide is popular for Pansat 2500a channels?

[sign403]

I receive alot of channels but I dont know what theyre showing unless I tune into the channel. That could take forever to get thru them all to find something to watch. Is there a good service that shows a complete program listing for all available channels?
Another Idea.. Is to use a Tivo unit.. This will give you a guide on your T.V.