We have directv. We've had many problems with their techs but now that Directv owns the local tech companies here, the customer service has been much better. Even with all that I feel they have the best channel line up. There are always rep's to call no matter what time of day that are willing to help. I also love the DVR service but I think they all offer that. New customers always have specials so your prices the first year will at least be decent. I think prices are all similar from talking with friends and family.
I haven't had cox in years and I've never had Dish network (only know people that have both). I guess if you've never had something else you don't what your missing or how great you've got it.
I have however been at people's houses that have Cox and I like my Directv better. I knew someone that had Dish and he said they didn't offer as many channels.
I would call all of them and see what they offer, things change and update all the time.
Let us know what happens. Good luck. :)