I'd recommend looking at the
HLG Scorpion lights. I wasn't familiar with these forums,
or much of anything else online beyond email, Amazon
or Netflix when I first bought LED. I believed a few companies false wattage/coverage claims, tried a few different LED fixtures and finally did some actual research and bought an
HLG Scorpion RSpec lamp. I run it in a 4x4 and I can say it's corner to corner coverage is better and it runs a lot cooler than anything I've ever had. I keep a small thermometer setting on top of the driver and it stays at 84-85F with the light dimmed to 80% . . . which is the highest I ever run it since I don't add Co2. I can't say that it's a better light than the others you are looking at, just the best fixture I've personally used in my limited experience.