3G Version.
The WiFi version does not have A-GPS. So alot of maps app will not work well with it. Think of it as iPhone vis a vis iPod Touch.
As much as wifi is indeed almost everywhere, its still not. On the beach, in the woods, in your car, in starbucks, all of those places do not have cheap wifi. Starbucks has but requires a GlobeWiz account, so no deal for others. With the competition finally starting between our local telcos for unlimited data this year, spending around 1K for unlimited data EVERYWHERE still sounds like the best and most economical way to truly get internet whereever you are.
