Sounds like a cool little project. I hope you'll post pictures if you go ahead.

I would probably use as many fluoros as I could fit in there. Normally I don't advise people to use anything but HID, but in such a small space, I wouldn't want to take up any room with more fans and ducts. I would probaly have a top shelf, that holds all the timers and stuff, and mount the lights on the underside of it. I would also try to find a variety that grows real short (lowryder?). I am a fan of NFT, but for this case I would probably use a real shallow DWC set up. In this small space I would not try more than two plants at a time - one in flower and one in veg. You said scrog, so you will have to partition off a section for the two different light schedules. I would have about 1/4 of the space go for the veg section and 3/4 for the bloom section. In my opinion scrog is definately the way to go. A little more involved to set up and do right, but you get to harvest twice as often.

I'm excited for you. I hope you do this. I would be glad to help guide you through it and I imagine others would too. I am not a weed god, but I have several years scrog experience.