I don’t want to put a spanner in the works but at festivals, demos and general keyboard society’s in the UK, most people do not put the Tyros 2 on top of the pile except in the styles department and the odd voice.
In the same price range as the Tyros 2, the board that always comes top (Even before tyros 2 was launched) is the Korg PA1XPro. (If you look round at professionals that play arrangers in the UK a great number have or are moving over to the Korg)
If you go to the 61 note PA1X (Which also has speakers) the price drops considerably, and while still not in the PSR 3000 price range is getting close.
As I don’t have or intend to purchase any of the boards mentioned in those price ranges, (I play a Wersi Abacus, and so none of them come close to make me even think about changing) I have no axe to grind with any of them.
To answer the original question, No you do not need a Tyros 2, but if you like it above the others, and have the dosh, then go for it, as in the final analysis it can only be a personal choice.
To add to the post, when Tyros 1 was released you would be forgiven for thinking that it was outselling others, (And so must be the best) were as in reality, in the shops that sold both the Tyros 1 and the Technics KN7000, (So people could compare the 2) the Technics KN7000 outsold the Tyros 1 by a factor of 2 to 1.
I think this must be the longest post I have seen since I joined the synth zone

Bill