We bought a 2003 Adventurer this year, should be pretty similar to your Itasca. Has a roof mounted dish and also had a tripod and a ton of cables for another dish but no dish.
I replaced the bedroom TV with a 26" flat screen and the front TV with a 32" one. Replacing the front TV was a real nightmare. Once you remove the plastic surround you find a metal cage the TV sits in. That cage is welded to and hangs from a cross member near the roof. I had to cut the metal cage loose from the cross member to remove it.
Anyway, it's down now and worked out pretty good.