I've owned the iPad 1, iPad 2, sold both bought a xoom, sold, it, bought an acer iconia (returned), went for some tim with no tablet, bought the transformer (loved it but speakers were terrible and no apps at the time) returned it, bought an iPad one, used it for months needed quick cash and sold it. Went for 8 months or so with no tablet, decided to give a small e-reader a try bought the kindle fire, like the software Hardware can't keep up, needs more ram (returned it) bought an HTC flyer LOVED it, come to find out apps are still lacking, but whatever. Seen the new iPad 3, did not impress me..... had some more time with the iPad 3 and came to a revolution, my mystery headaches were from low res screen!! Bought an iPad 3 and remembered what I loved about the iPad, it really is an amazon device....
iPad one still running strong against Newer android tablets, try the tegra 2 acer iconia vs iPad 1 and you see what I mean. 9 out of 10 times you'll pick up the iPad and won't look back.. that said, no miniSD sucks but with the iPad there are work around like connectors, or wireless hard drives that stream. the iPad 3 screen is wonderful if you read a lot, it really is a great device.
to me Android phone all the way (galaxy note here) Love my high-res, bright, beautiful, large screen with a sweet stylus. Also miniSD card and 3 extra batteries, not that I need them the Gnote battery gives my 40 hours low use, 24 house good use, 14 hours heavy gaming and netflix!