I'm planning on a getting a fta system. I was wondering what size dish should I get? I will initially be trying to get just the fta channels from IA5 by getting a fortec or pansat receiver but eventually I might get a globecast receiver to subscirbe to globecast channels by subscription? Would I better off to get the 36" fortec right from the beginning or get the 31" size? I know receivers from pansat, fortec, coolsat should work ok to get fta channels from IA5 using a 31" but I've heard that the receiver from globecast is weak and might need the bigger dish. Is this correct? Does anyone know why the receiver for globecast is weak compared to the receivers from fortec?