Since you only have 4' headroom to work with you'll be limited to shorter grows and that means you can use the 1w LED lights which will save you a little money and gain a little efficiency. As to which lights, I can't help you there (I'm still a HID guy) but maybe one of the others will be able to make a suggestion based on your budget. LED is pretty expensive so hopefully 300 will be enough.
I still use HID and I'm NOT an LED expert. All of my LED knowledge is from other parties or research so I can't say from first hand experience one way or another. I also run a medical grow consulting business in SoCal.