1. about the fans - if you do any intake fans, only do one. have all the rest exhausting the air. you want negative pressure. read up on it on the forums. i can give you basic info if you need, but it's best if you read up yourself.

2. now i grow hydro, so my knowledge in soil is limited. however, that "added nutrients" phrase makes me think that it might be too much for seedlings. maybe okay for older, more mature plants, or even hearty clones, but not seedlings.

3. that LED panel sounds lame. just from the small amount i've read on leds on here, the procyon 100 is the only worthwhile led grow light. find SnSStealth or Whiskeytango on here, and ask them if your panel will be worth your time. just my 2 cents.

4. buy a hygrometer to monitor your temp and humidity. it'll be worth it. get one with min/max memory to document your "peaks and valleys." i use CFLs (12) and a 4-site ebb/flow table in a wardrobe, and the CFLs give just enough heat to keep the temp ~72*.

5. if your wardrobe is in a seperate room, close the door and put a few odor killers or air fresheners in there. should be fine.

6. pics are awesome. post em please.

EDIT: from a quick google search, it looks like Levington offers a seedling/cutting soil. get that if you haven't got the other stuff. or, get both and transplant into the soil the guy recommended. or just buy nutrients to add to your seedling/cutting soil.

don't forget to soak up all the knowledge you can from these forums.
stay safe
GG84