I've never grown it, but I always heard Sensi's Big Bud is great commercially. Personally, I'd go back to the basics. Big Bud, Super Skunk, Northern Lights, etc. Strains that have been around awhile that we know a lot about.
Another thing to keep in mind is flowering time. Someone mentioned Kandy Kush. A friend of mine grew that out recently and while he said it was amazing, it went 11 weeks. That almost 40% longer flower time that an 8 weeks strain. If it yields 40% more then great, but if not you are better off going with a 8-9 week strain and getting more harvests in over the course of the year.
Is yield the only factor? If taste, smell, potency, etc aren't important, then go with a known high yielder that is a fast finisher.
I'd also consider going hydro. Maybe not all at once, but slowly phase it in.
Check out
http://en.seedfinder.eu/
Anything you ever wanted to know about any strain. Good Luck!