1080P tv or Projector ???

I have a choice to make. Do I buy a Mitsubishi Diamond 73" TV with 1080P, or do I get a Yamaha DPX 1300 projector with a 100" screen. For reasons I won't go into now, I will pay almost equal price for either one. The Yamaha is 720P, not 1080P. My friend has assures me I will be much happier with the Yamaha. I will have Satelite, and Cable, both with High Def.
A very good Dvd player and also a Blue Ray player. I have a DVDO+ processor also. What will I want to watch all these sources on? Any informed responses will be greatly appreciated.