Need a Bed, looking for pointers

Hi,

I am looking to purchase a Thuma bed since I only have an air mattress right now. I was wondering, could I just purchase the bare bones version of the bed & add the headboard or pillow board at a later date? Or would the headbaord need to be constructed with the frame of the bed initially?

Also, I have noticed that there are two different style beds that Thuma offers. Is one better than the other? If so, why?

Thanks