32GB WiFi iPad 3 or 16BG WiFi iPad 4 for Photo Retouching? The 32 GB storage is a plus, but the MUCH faster processor, lightning connector and future proof of iPad 4 is tempting too. As photo retouching apps advance and need more horsepower the iPad 4 will deliver, just don't want to run out of space with 16GB. Which one would you recommend for Photo Retouching?