Price Paid: Packaged with console (which was $300).
Coming from a non-fan, I was pretty impressed. I find it hard to imagine them doing much better than this without radically altering the formula.
Alright...there could be more enemy diversity. They could be a little more experimental with the weapons. The final fight was a little anticlimactic. Also at the end of the single player campaign, there were a ton of questions I still had about the plot.
But these are nitpicky things. Overall, I thought this game was pretty amazing.