I think it depends on the price you pay for it.
I bought the note about 2 months ago for $199 from Amazon.
At that time I didnt have to pay tax and I was able to sell my iPhone 4S for $575 so it made sense for me to do it.
The new note 2 will probably be $299 plus tax so you should take that into consideration.
If it was me, I think I would wait but then AT&T sometimes has refurbished units for $50 which I would say is worth it if you can still get it.