Those things usually have a tall, main compartment and a short secondary compartment.
Tall one- get a HPS400 for flowering with a CRAPLOAD of ventilation in there. A good extractor fan is a MUST, and an air-cooled hood is going to make life easier.
Small one- shell out for a 24" New Wave T5 flouro fixture for vegging under. It's a GREAT gadget and will be perfect for that closet/wardrobe thing.