I know Im going to get hated for this but.....
I have just purchased an Ipad.
I too wanted a new tablet, and I had pretty concrete criteria for what I needed: Table top web browsing, video, music, some games, some photo editing and audio editing. That kind of stufff. I already own a SG2 of which I am very happy with, and I have always maintained I would never buy Apple.
However... I spent the best part of 2 hours standing in the store with an Asus Transformer, a Xoom a Sony Tab and an iPad 2. And after much soul searching and such like I had to admit to myself that for my given criteria the iPad was just fast, smooth and sadly an all round better experience. I was deeply disappointed as I had fully gone out with the intention of buying a shiny new Droid tab to complement my lovely samsung galaxy 2 phone. But I knew that if I had of walked outof there with one and not the iPad I would always have wished I hadnt. Yes the Droids are more configurable (although ios 5 does change that game a little) and yes the Droids aren't the evil Apple and yes the Apple is a walled garden etc etc... but i was just better alround for what I wanted. Im part sad, partly feeling like a complete traitor to the cause, but also (I have to say) thouroughly enjoying my new Ipad. Maybe in a few weeks when I cant change the desktop or change the lockscreen or whatever I may have a tinge of regret. But right now I think I am happy with it.
Caveat: I would NOT change my SG2 for an iPhone at all.