I've been considering that, but the high-res display is:
A: Unneeded- I have really good vision.
B: Use to much resources. The iPad 3 has the A5X, the same processor as the iPad 2, just optimized for the power hungry display. This leads to lag and inability to play power-demanding games.
Also, the 3rd generation iPad is about half a pound heavier then the second generation. Not that it matters, just saying.
LTE is useless for me, I would prefer tethering my phone (legally of course) when I need it.
So the iPad 2 is looking like my best bet. Add a keyboard case, and hopefully iOS 5.1.1, and I'll have a beast of a productivity machine!