Just picked up an IPad 2 64GB 3G from Target this morning. Only had an hour or so to play with it before I had to go in to the office but the lighter weight and faster processor are a definite upgrade over the iPad 1. If you don't mind waiting until stock replenishes (they are very difficult to find right now) and want an iPad, I'd hold off until you can purchase an iPad 2.
FWIW... I would have purchased the 32GB but they only had the 64GB. You can pick and choose (down to a per-episode/song/movie level if you want) which movies, photos, songs, podcasts, etc., you want to sync to your iPad, so you can manage the available space on it pretty easily if space becomes a premium. Folks that have an iPod/iPhone or other MP3 player can skip syncing any music to the iPad at all if you want to save more space. There are a lot of options.
Here's a decent review with pros and cons:
Gizmodo, the Gadget Guide
And not to mention.. you can hang it on your fridge! ;)
Gizmodo, the Gadget Guide
BTW... if you have ANY eventual desire to purchase an Apple TV for $100, AirPlay is slick as hell and is a huge value-add feature for the iPad/iPhone.
Apple lists AirPlay-enabled apps in a new App Store section | 9 to 5 Mac Apple lists AirPlay-enabled apps in a new App Store section | Apple Intelligence