i would go for a pro grow 260, or wait till you have a little more cash and buy a advanced extreme flower 200watt led. dont get the hps unless your willing to get the inline fan aswell. but for 400 bucks that is a deff possibility also. hope this helps
I have a similar sized space and my Advanced LED 200w diamond series is perfect for it. I also have the 180w extreme flower model (both about $500) does a great job in the same sized area as well.
Fan, yes, I recommend one, it can even just be a small desk fan. Not because it will get too hot just for air circulation. Carbon filter is optional though. I don't have one. There's plenty of other alternatives if smell is a concern.
No need to drill into your closet if you go with led.
I have one Pg 90 led but im starting to flower and know that i will need more power i have one plant in tent at moment but have a couple of clones in a mother in a cab. Im just looking for the best results without the heat i have circulation fans blowing on plant. And have a do it yourself ona odor bucket for smell.