Which? Used 357 Magnum Plus orNew Blackstar 500v

This would be for a 3x4 scrog area, 2 plants. I would also supplement w/ a 175w vented HPS/MH I have. Either way, I'd probably add a couple of all red Dorm Grow 80w UFOs at flowering. These will be in Waterfarms w/ a circulating reservoir. Plan to use Nova Bloom nutrient.

Thanks in advance for any advice. Have grown in past, but not w/ LED nor a scrog.