Wow, so difficult inaccuracies to address above. First, the coax output on your 211 is NOT HD and you cannot sent ANY HD via coax without some specialty hardware. You CAN "receive" HD via your OTA TV antenna and the HD tuner in your TV will broadcast HD on that TV alone but you can't send an HD signal from a source like a satellite receiver to a TV via coax.
The BOMB (box of many buttons) is a distribution center and if you don't know what it is then you don't have one and this does not apply to your situation.
You mention that you are "looking" at a new TT. Are you certain that the only connections to each TV is coax? If so, the only way to get HD satellite to each TV is either with a splitter (despite someone saying a splitter won't work, they work perfectly and are installed as factory options by many manufacturers) or by using multiple receivers.
Yes, wireless HDMI repeaters are available as you mentioned and they work but they are not cheap.
Now, here's what might be of the most value to you. Both DirecTV and Dish have receivers that can be tied to wireless remote receivers (mini-Genie for DirecTV and Joey for Dish). You have the master receiver connected to the main TV and a client at each TV for about $7/month each. Maybe you could get away with just one client and a splitter from 1 receiver to the 2nd TV. Not knowing the layout it's hard to tell. No matter what you want to do it can be done fairly inexpensively. Even if you had to have the dealer install a splitter and run an HDMI cable to the other 2 TV's it should be a relatively inexpensive when compared to the overall purchase price.