I'm not personally a great fan of femmed seeds for the risk of hermies.
You want a beast? Go with Pure Power Plant... She's a classic, she's a yielder, she's a STABLE line (you can then make your own seeds and never buy them again), and you can find beans online. I got mine from seedboutique (no complaints there) but there are plenty of other vendors and I'm not here to push any one vendor over another.
If you like the idea of the FoxFarm line, and can find it, go the whole way and add the Grow Big and their proprietary bloom fert (big bloom? ehh I'm forgetful) to your OF and supplements and follow the company's feeding schedule. This will make your life easier, since they are all designed to be compatible.

As for pot sizes and transplanting, take a peek at my Donkey Dick grow log. That's how I like to do it personally and find that it is an efficient use of both light and space.