I can't help but like the Viewsonic PX727-4K. From a street price standpoint, as of our publication date, it seems to be the least expensive of the 4K UHD projectors shipping in the US. Before the PX727-4K started shipping, currently advertised at $1299 online, we referred to the almost identical BenQ HT2550 (which started shipping earlier) as having the lowest street price (now about $200 more).
$1299 is one fine street price for any projector that can handle 4K content at this time. Consider this a projector primarily for the home theater - or at least a room that you can darken completely - or at least very well, for night time movie and other viewing. If that's not your setup - you are more - put it in the living room or family room where it's rarely very dark, the PX727-4K isn't the right choice for you - rather, it would be the PX747-4K - a projector identical, but for the color wheel. This 727-4K will ultimately have the richer color (slightly), but the PX747-4K claims 3500 lumens not 2200 lumens like the PX727-4K that we have here.
More and more 4K UHD projectors are shipping so that there now must be 15-20 out there between the two resolutions. (We have already had 10 in house, with at least 3 more coming in over the next two months.)
Like the other 4K-UHD projectors using the smaller, less expensive 1920x1080x4 DLP chip, that means that, under most circumstances that chip can’t produce quite as sharp an image as the higher resolution chip that started shipping early last year (2716x1528x2). Both, however, under ideal circumstances, will come up short of a true native 4K projector, and also will slightly exceed the perceived sharpness of the JVC and Epson pixel shifters, which have the same size pixels but only shift x2.
Your first important decision, isn't whether, say this PX727, (or a BenQ, Optoma, Vivitek, or other) is the right one to choose, but rather will it be one of these, or will you go with something that is more "home theater" with much better black levels for handling very dark scenes?
Those with far superior black levels (and 4K content handling) start in the low $2000s at this time.
If you have decided not to splurge on black level performance, or other advanced features such as lens memory (to work with wide screens - movie shaped), including lens shift, then the Viewsonic starts looking like the bargain out there.