Hard to go wrong with my Vizio 70" 4K for cheap. Had this for a couple months and 4K signal off the web is stunning, blu-rays and Xbox1 are incredible sharp and crisp. You won't get that with a projection, but that screen on the wall also gives you a softer look for movies.
Vizios Premium series. That's a big bright screen for under $2K. and in some ways better than Samsungs or Sonys which cost twice as much.
Vizio 70" Class (69.5" Diag.) 4K Ultra HD Smart LED LCD TV M70-C3