I would not consider DirecTV at this time. Only DISH and with the portable "Dome" type antennas you need one dome for each receiver.. Or alt if you want "Same show on all TV's you can so some electronic magic and either convert HDMI to Coax or run a 2nd HDMI cable to the 2nd TV.
Dome antennas only get KU band. Dish uses 3 sats on the KU band so if you have multiple receivers odds are you will want a show on one bird and your wife another.. So you need one antenna per receiver or a triple dish (Standard Dish 1000)
Direc uses two bands KU and KA and the HD programming at this time is all KA. they are discontinuing SD and we do not know what will happen to the bird at 101W (The SD bird) when that happens. AT&T is trying to push their cable/fiber streams over sat delivery.. From this point on my feelings venture into the political arena so I'll stop here.