I purchased a cover with built in bluetooth keyboard, a 5-in-1 card reader (which includes USB support), 3 clear screen protectors, & styluses. All of that cost me about $36 shipped on Amazon. I guess with the cost of the cover being so low, I'm not too worried if I don't really like it, though it seems to have gotten good reviews. I'll let you know.
As for the differences between the iPad2 and the New iPad, there is a huge difference in the screen resolution with the Retina display, it will take 1080p video @ 30fps, and it has a quad core processor, all of which add up to a large improvement to the iPad2.