Sun Systems lights. Fox Farm Ocean Forest Soil. Organic Nutrients (foxfarm, Roots Organic, Earth Juice). Sun System or Lumatek Ballasts. Phillips Agro-Sun bulbs, or Eye Hortilux. Air King or Eco-Plus fans. Air-Sok or Carbon-Aire filters. Hydro Hut, Grow Lab, or Sun Hut grow tents.
The point is...you want to find Reputable, Big name brands so you can get feedback from other people who use the same things, get parts and repairs, and have good customer service and such for those brands. (off-brands are sort of inferior)
But you want to look for good reliable brands, and ones that are reasonably priced for your applications. For instance, Advanced Nutrients, or maybe Humboldt Nutrients are good brands...but they're very expensive, and are just as good as cheaper alternatives.
Its all about finding good quality products that meet your needs for a reasonable price.