iPad 3 vs 4?

I currently have a 16GB iPad 2 but need more space. A refurb 32GB iPad 3 is going for $469. The refurb 32GB iPad 4 is out of stock but goes for $499 I believe. Would it be silly to not wait and pick up a 4th gen for only $30 more?

My iPad 2 runs fine but can't store enough music and movies for traveling at least a week every month.