A $200 Toshiba, because that seems to suffice your basic needs of asking stupid, mindless questions on here without stating any other information that's necessary for us to consider before responding.
He asked which one would YOU choose. Not which one he should choose. As always it's speedy with the sarcasm around here.
To answer your question. I've been considering the same idea.
11" Air for sure and it's a toss up between the 15 and 17". The size of the 17" screen is appealing.
17 + iPad 2. No need to have 2 computers with a 17+11 or 15+11.
Macbook Pro 15 inch and Macbook Air 11 inch vs Macbook Pro 17 inch and iPad 2.
Macbook Pro 15 inch and Macbook Air 11 inch vs Macbook Pro 17 inch and iPad 2.
MBP 17" + iPad 2 if I had to choose between your options.
MBP 17" + 32GB iPod Touch is what I actually chose.
I don't see the point in having a notebook AND an iPad, as you can't carry either in your pocket, but you can carry either in a bag.