Not sure how i've managed to miss this thread to date, but glad I found it.
Considering the '18 Mini to replace my 27" '11 iMac and side 21" monitor, because I realized the wall space in front of my desk would exactly support a single 43" 4K UHD TV. Because I've enjoyed my 55" TCL Roku, the s517 43" gets good reviews from RTINGS as a monitor option.
Considering the costs savings (TCL - <$300!), the cleanliness, other feature benefits (can use for other purposes in my office, screen real estate), etc - I have this overriding sense this is a bit of "too good to be true". And I'm thinking that comes in the form of sharpness of image, is my seating position too close for this size screen (32-35" away), heat output, or whatever it may be.
I'm not stuck on the TCL, just using it as an example. Appreciate any and all insight, suggestions and recommendations. (should add I use this set up additionally as a "tv spot" in my house, so streaming video while working or just to watch is an important use, along w/ normal day to day work stuff)