Small, top quality plants should be your goal. Don't get greedy. Small indica strains work best. Don't try sativas , except for Skunk. Even at that, be prepared for lower yields.
Compact plants ensure a better yield with less maintenance.
The negative ion generator is God's gift to apartment growers. I've been told that they can make you feel better by removing pollutants in the air and altering your mood in addition to the peace of mind derived from knowing that your garden's smell won't give you away. I'm going to get another one for my living room. It's cheaper than a bust. A high phosphorous formula from the beginning is important to shorten internodal length and keep your low-profile garden low.