I was trying to figure out the conversion on size myself. OK, 48 x 43 x 18 inches. Almost 4x4 I would go with 1-1000watts but that's me a 600 will do the whole thing. CLF's are good if you need to veg for a while. And cheap on electric. I think if you go some where close to you like hardware store and check out some 4 foot 2 tube fixtures. Real cheap. I would get 3 and some good daylight bulbs. That's 6, 4 foot tubes over a 4x4 area.
I like the Idea of venting the hoods for the bigger lights.

Yes the big lights give off big heat. You will need venting and A/C.
You need the HPS light to flower. You can with the clf's or floro's but you will be disapointed.

Heat and smell will be your worst problem. Are you sure you can handle the paranoia ???