How much difference between SD and HD

PennyPa, its a matter of personal opinion. I'm perfectly happy with SD, its much better than the TV signals I've watched for half my life. HD may be better, but to me its not worth the hassle of changing out all my dome antennas and existing receivers. I've got 3 houses & 3 RV's all setup with SD; no use changing one unless I'm going to change them all. I do buy high quality TV's and that's just as important as the signal.

PS: no dome style antenna works with DirecTV HD, that includes all the carry out & roof mount domes