Help me plan my grow room

Guys, I am going to set up my first indoor grow room and wanted some help from u pros. Here is what I have to work with...

Closet space 6' x 5'

I am going to put mylar all over the walls to help reflect light onto the plants, here are my questions...

How should I go about maximizing my total output. Should I do a small sog or just do like 3 larger plants? Is a 400 watt hps going to do the trick for me or should I get something else?? Is it possible for me to do hydro grow or would you just go with soil. Basically you guys tell me what you'd do given this space...

First of all stick with the 400 hps thats what i use and I love it....you might have to have pretty good ventilation though. I prefere to grow them out in vegg with 24 hrs of light till they are between 20 to 23 inches then put them into flowering. I think for a first time grow its your best bet because you will gain a lot more knowloge thru the stages of growth and knowloge is what you gotta have to grow some dank. I use soil for all my grows thats just what i prefere and all my supplies i need are easy to get at local stores and its just easy to use....whereas with hydro you might need a specialty shop for a few things.....hope this helps and i covered some of what you wanted....good luck