AT&T 3G plans: postpaid or prepaid?

[mayonaze03]

I was wondering what fellow iPad 3G owners and members of this forum prefer and why? I currently have a 2gig prepaid plan. I also have an iphone 4 with unlimited data. I must admit I am a data hog and I am sure I can keep within the 2 gig limit if I must but would really love to use 4 gigs and could easily.

So, what do you guys have and why?

Thanks in advance.

 

[HazChem]

I plan on getting the post-paid plan to take advantage of the 1-month free offer from AT&T.