Buy iPad 3rd gen or 4th gen? Help needed for a first time Apple buyer

After going so long without an Apple product, I've decided to buy an Apple product to create an ecosystem parity for my products. Current lineup is Lumia 920, Win 8 PC, Kindle Fire, Kindle Paperwhite and now iPad.

Now the question is should I buy a iPad 3rd gen 32GB Refurbished or iPad 4th gen 16 GB? There is not much difference in price of both and are within my budget. I will buy a 3G version if I could but it's too expensive for me. What you guys recommend?