I'm really in doubt about this as well. I want an iPad for two things:
1) Studying. I have a lot of big textbooks to read, books which are so big that they are hard to hold up; and most of the stuff I have to study are scientific articles published on the internet, so I would either have to read them on my computer or print them and carry them around.
2) Writing. I take a lot of notes on my iPhone; it's the tool I take most of my notes in, in lieu of a physical notebook. But writing on a keyboard as small as the iPhone's, while doable, is tiring.
I'm not worried about the price. To me, the iPad 3 has the following advantages:
a) It's newer, so it's likely that it will be supported longer. I'm still using my iPhone 3GS, so if I'm going to buy something, I want something that will last. As as the iPhone is becoming too slow, I hope the new iPad will last a long time before it becomes too slow to deal with iOS updates.
b) The new screen is better for reading, which is something I do a lot. Even if many apps are not yet optimized for the new display, the apps I need to read PDFs are optimized already, so this isn't a concern.
c) The better camera may be useful (often I have to take pictures in my work), but this isn't really a major concern.
At the same time, the iPad 2 has its advantages:
z) Battery is better. I use my iPhone 3GS so much that I have to keep charging it during my work, but I have access to a lot of UBS ports, and little to no access to an electric wall socket. If the battery of the new iPad is really so bad when just writing or reading a PDF, I risk having the device losing its charge significantly early in the day.
y) It's avaliable now. I'm not in the USA; I don't even know when the new iPad will be released in my country, while the iPad 2 is readily available here.
x) It's faster? I have been told that the iPad 2 is actually faster than the iPad 3 regarding most tasks. Since I'm not that fond of watching videos, and we can't really play games through the iPad in my country, having faster graphic processing doesn't really make a difference, and it appears for everything else the iPad 2 is actually faster than the iPad 3.
Does anyone have any opinion on which one would be better for my needs?