I dont think there will be any iPad challenger for a long time. Not really a Mac supporter, but there is something about Apple that no one has yet to be able to challenge it.
For instance, anyone who have used a iphone will know what i mean. I am a SE person and I am always amaze with their phones. Recently took a iPhone and immediately the rest of the other phones feel outdated though most of them are more powerful and have better features than iPhone.
Last month i signed on a new phone, went for the "top of the range" Satio. Within 1 day I feel like throwing that Satio into the drain! Guess I am now stuck with the iPhone, and probably will get another one soon.
iPad, i will definitely get one, no doubt about it!
you should have gotten the Android phone from SE (X10).
and you will probably feel that iphone is just nothing..