Hi there, I just got my satellite dish installed, I had purchased the bell expressvu receiver and a 20" dual LNB dish. When the guy came by he said he already had a dish put together (mines was still in the box) so he can use it instead its make no difference. What he installed for me is called meridian or something similar with 1 LNB and the dish size is probably 18" much smaller than my original. My question is, are they really just about the same, is there any advantage in having one over the other? I told him that it doesn't matter to me so he installed his. I called up bell to hook up my receiver and its all working. So was the switch in the actual dish size any big deal?