Do you require them at full brightness? If you half the brightness, you'll half the power draw. Make sure the ground of the power strip is wired to the same ground for the Arduino (this gave me problems). If you are going to run at full brightness white you will need some decent gauge wire also. How many power/ground lines are on the PSU you bought? If 3 id put 200 LEDs worth on each main. This will help in the long run for you.I just did a similar but smaller project (440 LEDs) so I'm fresh on this project.