My Wife and I are going to be going through dish network for satelitte.  We have been looking at Sat. receivers on Ebay and are noticing some come with a smartcard and some do not.  Is there a reason to have one with a smart card?  Is there anything I should be worried about such as Card Rom and Div #?   What kind of dish should we go with?  I have noticed several different kinds. We are just looking for the basic setup....We don't need anything special for HD or DVR.  Any information would be greatly appreciated. Thanks