Sub Total: $1,154.29
Shipping: $12.76
Sales Tax: $0.00
Total $1,167.05
Your posts were very helpful. Wasn't aware B&H did that. I ended up waiting, watching the prices, and purchasing from Amazon. (Both prices dropped). The Amazon price was higher, but warranty was three times less expensive than B&H. I realize the monitor comes with (generally) a three year warranty, but for $42 or whatever, it may help if LG's customer service is non-responsive.
GOOD
Default color profile was pleasant. Brightness wasn't blinding.
BETTER
Worked out of the box. Used included cable. 4096x2160 @ 50 Hz. Mac Pro 2013 with Dual AMD FirePro D700. OS X 10.10.2. SST. Not sue what will happen at 60 Hz, may try 10.10.3 beta.
Amazing display, even given it's limitations.
NOT SO GOOD
The screen unevenness is quite noticeable, especially on dark screens. Appears it's a result of the LCD polarizing filter. Can see a color disparity. The screen is large enough that there is no "sweet spot". If you move, part of the screen may improve, but another will get worse. The bottom left corner is particularly bright.
Two dark pixels, side by side. Given the resolution, it looks like a small spec of dust. Difficult to notice. Ran through three screen colors before I saw it. Had to take a photo to see it was two pixels. Will probably just live with it.
VERDICT
GREAT display!! 5K at 31" for me would be ideal. 27" Just doesn't give me enough space to spread out on with some apps, even with a second monitor.
Nice to not have to deal with the MST issues. I like the 4x2 ratio. Works well with expansive apps, as well as being able to put things side by side for comparison. (Financial statements, financial ledger.) Won't need to resize windows repeatedly.
My last two monitors (HP / iMac) started to delaminate. The unevenness isn't that bad. This monitor has several great points above the competition. I'll keep it!
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Many have said they prefer the 3k mode in OS X. I can see that. Menu items and tools are still small, but do not take a large part of the real estate like on low-res monitors.
I actually prefer the native 4k mode. Text and elements are smaller, but they are not resampled, so they are a bit sharper (relatively speaking). Native resolution is perhaps a bit smaller than I'd prefer, but still doable.
My reading glasses are a must, though.