If energy efficiency is your motivation, I think you'll be disappointed with the lights you linked to. Those use inefficienty epi-whatever chips.
You should be looking at Area 51 RW-150, or DIY COB. More light for less energy. But, higher up-front cost. (Rapid/Onyx and ApacheTech are also common brands that use known LED chips.).
The common recommendation to anyone considering lights like you linked to, and who is concerned about upfront costs more than energy/heat costs is to use CMH instead (unless they're in a short space, then a Chinese import LED like those might make sense). More light for the energy and heat. If you're motivated by energy cost, those lights won't do it for you. If you run them at around 35w sq/ft you'll have airy buds. If you run them at over 50w sq/ft you might have decent results, but at nearly the wattage you're running for HID. By comparison, an A51 at 30-35w/sq ft works well. I think people run their DIY COBs at 30w/sq ft.
Area 51 is releasing a new model around April(?). It will use the latest Cree diodes for even greater efficiency. They'll be dimmable. Smaller fixtures that can be connected into a large fixture. Area 51 has a stated goal to provide upgrades at cost to owners of existing models. (An example of how you get what you pay for. The lights you linked to should be considered disposable in addition to being inefficient. You'd probably also have trouble making a warranty claim. Usually the way those work with Chinese imports is "send it back to China. Oh, you don't want to pay international shipping? How about we refund $30 and you keep the light?" There are some Chinese brands that handle this better. I've read TopLED/MarsHydro will mail you parts.
If you really wanted to go cheap and inneficient Chinese import, TopLED/MarsHydro and Vipar seem like the best of the worst.
Chinese lights aren't expensive. You can't be too disappointed if a $100-$200 light doesn't work out. You just have to keep in mind that you made that choice and not judge all LED by that experience.
EDIT: One thing to be extremely careful of is buying a rebranded Chinese light at extreme markup. Lush Lighting, Blackdog, GrowBlu, HydroGrowLED, Kind, Blackstar. These guys are short on facts (the chips they use, the spectrum/ratio they're selling) and big on hype. You have to ask, if they'll hype so much about their lights, why won't they hype the chips they use? Undoubtedly because they're not something to brag about. The difference between these and direct Chinese imports is that they cost 3-4x more. In the realm of predatory.