I waited a heck of along time to get an iPad, I ended up getting the iPad 2 Retina and I still cannot believe I have one. I carry it everywhere and thought my Tab3 was the bees knees but the iPad Retina just feels so right and works perfectly. It fits my pocket and bag, especially useful when I go out with the photography club and don't want the added weight of my laptop.
Now to the information part. I got the 16gb iPad 2 Retina, I knew I would get around the memory card issue and I have. I also purchased a RavPower 5 in 1. essentially has it's own mobile hotspot, charges phones etc, I can put an SD Card of any size into it, a memory key/stick, self powered harddrive (using 500GB at the moment) and I can access any of them via a WiFi address or when their is no WiFi in the area I put in the hotspot address and use the SD Card, Memory Key, small 500GB Harddrive, anything I wish. The speed is pretty good too. The RavPower 5 in 1 also streams movies and I can watch it on the iPad 2 Ret and other devices at the same time.
The above is just a little info in case anyone already got a smaller size like my 16gb iPad or is contemplating doing so and on a tight budget. Don't let the memory size impede you, the RavPower 5 in 1 gets around the issue and their are other similar devices. My RavPower is 1/4" thick, 4" long and 2.5" wide, light and easy to carry. My self powered USB HD is not much bigger and again easy to carry in a bag. Just a FYI.....