Momoo,

iPad2 is more of a consumption tool.  By that, I mean the uses such as surfing the web, reading online magazines, ebooks, watching YouTube, communicating via skype, using apps, etc.  However, if you want to write a paper or do homework, iPad2 is NOT what you want.  For that, you want production tool, i.e. a laptop or netbook or desktop, a machine with actual keyboard and more robust processor.

As for iPad vs. Android based pads, I think it is up to the user.  I, for myself, prefer iPad2.  Why?  I like its intuitiveness.  I like the ecosystem Apple has created around it.  Sure, you will find better hardware features in other Android based tablets, but when I consider the total package, I find iPad meets my needs better.

Now there is a rumor that iPad3 might come out as early as this September.  I don't believe it.  But Apple does do crazy stuff.

Another option that you might want to look into is the new Google Chromebook.  It is a thin client that needs to be connected to the Web at all times.  However, most of the sofwares are all provided by Google.  And the pricing is quite attractive too.  Check it out at www.google.com/chromebook

Hope this helps.