A second medium size reflector means you would be using a second 1000w light, correct? No matter what, a second light is better than one larger reflector alone. Plus, you don't have the plant numbers to quantify using a hood the size of a Raptor or Ocho. "Big" hoods distribute light on a horizontal axis. With 8 plants your best bet is keep 4 plants, 2ft-3ft tall each, under a 1000w. The hood you need is one that will penetrate deep and distribute light on a vertical axis. The Cool Sun or Blockbuster from Sunlight Supply are nice and so are the Radiant 8s from Hydrofarm.