Once I went with HD I couldn't go back to SD so I have a Slimline dish. Look around for someone that is moving. DirecTV says to take your receiver when you move and leave the dish so ask the people moving if you can get their dish since DirecTV most always installs a new dish for the new owners anyway. You could also look aroun for a DirecTV truck and see if the driver has one he would give you or for a small price. I have a tripod system from tv4rv.com and it makes setting up very easy. The quality is excellent and I have had mine for 4 years and I use it full time.
I have DirecTV's DNS service primarily so I don't have to reprogram my DVR's for different channels when I move. The programming is always right and worth the extra monthly cost to me.
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof