Mars hydro are best bang for your buck I have 3 of them 2 mars 192 series 2 and 1 300 w series 1
I'm with you.
I've got 4 of the Mars old style 300w'ers. I put one plant under each. For about $65 USD each, I think they're a great value.
Plant yield depends on a lot of factors, light is just one part of the puzzle. That said, I can easily get 3+ ounces per plant/per light off my cheap little Mars in a rather confined space. They'll do their job if you do yours.