If the size of them is about budget, then try looking at Viparspectra. They're pretty cheap compared to those two. And they also use Samsung LEDs.
- If you're in the US or Canada, you can get the 300w I'm using, for 69$, or the 450w they have for 110$, or the 600w for 160$ (I'm in Europe tho, so I paid double at a reseller, which is still an okay price imo..)
I use the 300w for 2 plants.. It worked fine as well for 3, but I probably wouldn't add more plants than that.