All right...well, first off. It's really nice to hear that you are really interested and have the resources to construct a decent set up.

First things first, I'm sure any expert here will tell you not to get too advanced for your first grow. You have to learn how to grow before you learn how to make it better

Second, you musn't overlook the whole ventillation issue with a closet grow, that's really important!

As far as lights...Find Rhizome's noob guide and hit up the electrical section, might even want to check up on the ventillation section too! That'll give you all the information you'll need as to how much lighting you're going to need.

Mylar is good, do that, it will be helpful

If you are intent on DWC I advise that you read up a lot on the construction and maintanance of the type of bucket you're looking for. You are going to want to know your grow set up forwards, backwards, front, back, and inside out before you begin.

As far as big yields, and fast grow times...you're going to want to research some big yielding plant strains online, generally though, the more yield, the longer the time it takes.

Another addition to larger buds is the nute situation, do a lot of research on your nutrients as well before you begin, that's super important.

You've got a lot of reading to do. Good Luck

and 600grm / m2 means it should average 600 grams per meter squared of the plant. So basically, the more square meters you veg the plant to, the more bud you'll have, but that's just common sense