I was just wondering which is better, is ther a new model coming out. which is better on a 120inch screen , 20ft from screen, in a dark room?

thanks

Try a simple search. There is countless threads on these two units, and even some that ask the same question...

But, based on the info you provided, go with the 750. It is much brighter and has the added benefit of an iris.

The 750 hands down. You haven’t had much response because it's an easy answer.