There should be another option on the poll.
"Neither, my K2/K1 is fine for me."
BUT, if I were buying my first Kindle, I would go with the 3G/WiFi option. Nothing better than standing in the airport bookshop and downloading the book in front of me for a lot less than the sale price.
With the collections update on the K2, I don't see enough changes to warrant an upgrade to the K3. Maybe next year.