Fox Farms Ocean forest is super popular and good quality. I've found it to be a little too strong for my younger girls, but I think that is strain dependant as I have friends who use it for rooted clones with success. I personally start in Pro-mix Seed starter now. It's 1/3 the price, and I can manage the nutrients myself. I haven't use Fox Farms nutrients however they are also quite popular and I'm sure will work just fine for you. In regards to bigger yields, and better THC content, that is subjective based on the alternatives you have available. These are however upper end quality choices, so you would be hard pressed to find something anyone could convincingly say would do better for you.