ok i have been with directv for a about 3-4 years now. im still on the standard reciever etc. I want to go with the hd and dvr. i have 4 receivers total. do i have to replace them all or can i just get one hd receiver. I want the one on our living room to be hd. the others in the bedroom and garage i could care less. also will they have to replace my two dishes since i get locals also? I know about all the extra fees etc. what i want to know is will i have to replace all my receivers and dishes. any info will be a great help.