I recently tested all the 1'x1' bi-color panels on the floor at B&H. I found the best value to be the LEDGO LG-600 which is only $400. Very good TLCI/CRI. Brightness about the same as the Kino Celeb. I've tested about 30 LED panels so far - there are a lot of practical issues to consider when choosing one to buy... Some have very steppy dimming at the low end, some only dim to 10%, a few have a nasty green spike. Many now have built in battery plates.
Since I don't have access to a proper camera I have not been able to test whether they have issues with on camera flicker. I'm concerned that the cheaper units like this from an unknown manufacturer could have flicker on camera when dimmed below a certain level. This would be a very useful thing to test next time!