If I buy a 510 that has the infered remote that will go through walls how does the wiring work if I want to hook it to 3 TVs? Do I have the "Out to TV" from the 510 on a 3 way splitter which goes to each TV?
Yes. You would use regular coax cable from the 510 to a splitter then to the other tv's. You could also go wireless and use something like the Terk Leapfrog system. Also, just fyi, infrared doesn't go through walls and ceilings. It's the UHF signal that does.