I have both dlp and led (Mits and samsung, vizio).
Mitsubishi is far from being low end. Who ever said that is not very old or dosen't like mitsubishi for whatever reason.
DLP is not going to be as good of a picture as led primarily because its not as clear in dark situations for normal viewers. ( in bright rooms)
In a dark room calibrated it will perform as well if not better with fast motion images.
That being said if I could afford 4500 compared to 1500-1800 for a DLP @ 82" then I would buy the sharp.
I will be pleased 100% of the time, If I buy the DLP the 10% I'm not pleased with it I just need to say to myself,
I saved 2500 for my 4k TV in two years that will be 95" and better than both.
Good luck and hope you buy the sharp I think I'm going with the Mits.
But which one 742 or 842 ......or should i go 840 or 740 dammit maybe i'll just take a loan and get the sharp!!!