guitar hero aerosmith ps3 vs. ps2?

okay so im getting guitar hero aerosmith and is really exsited but im getting guitar hero aerosmith and it dosent need much graphics should i w8 and get it for ps3 with 1 controller for lots of extra $$$ just for graphics or should i get it for ps2?
and buy the way that link is a scam u spend at lest 400.99 on the sign up and then monthly fee's there is no such thing as a free lunch