If you only had to pick one service to use which would it be ?

[bladerunner1]

Vudu, simply because it has more options at this time. (MD2D/Vudu App available everywhere/free movies ). However when iTunes releases its app and if the quality is as good as the current 4K box (which i hear streams at a higher bit rate than anyone else) - I'll probably go there more often.

The free 4K upgrade thing is also very cool.

I'll most likely use both.