Go BIG...or go frustrated!....I have the IP2-64-wi-fi/3G version...and LoVe it! The extra storage allows for quite a decent number of TV Shows and/or Movies. Those are the big GB hogs, and it's amazin how quick they fill a device, or computer up. For example, "The Hunger Games" is 2.0 GB, Lion King is 1.2...lots of data to store there!
Save a few bucks for a good set of earbuds too...the built in speakers are lacking in the serious output ability.
As soon I pass this one "down" or break it, I'll be getting the 4G-124 GB. You always have the ability to get online, even when wifi signals are intermittent...as they usually are in our area.
The Verizon model is billed as an added phone line at $10 bucks per month, and uses our shared data plan, so you need to keep an eye on that.
As PPs have said, if your not gonna be using it to store many movies/shows/music/photos...etc. a smaller memory may work fine for ya.
Best wishes!