I just go a smart cover with my new iPad, and I
love it. It integrates nicely, and it puts the iPad to sleep when you close it.
For my first iPad, I had a bulkier cover, and it really added to the weight and size of the thing.
It looks like Amazon has the 16GB model in stock:
http://www.amazon.com/Apple-MD328LL-...4675038&sr=8-1