iPad three is coming out in two months. Sometime in April. There are no official announcements but all the clues are there. I would wait until then if you were gonna get an iPad. A really interesting upgrade in the iPad 3 is the retina display as it will be double the resolution of the current iPad2 and there are also talk that the iPad3 will now be LTE 4G capable.
Here are the costs for the different models:
16GB = $499
32GB = $599
64GB = $699
And if you want to access the Wi-Fi + 3G, then:
16GB = $629
32GB = $729
64GB = $829
This link gives more information: http://funadvice.com/r/bphvb7l2bra
Prices for the iPad 2 will come down when the iPad 3 comes out around March-April.
3 times as much as a mp3 player with all the same features
Depends on the model. Go to Mac for exact prices.