if you want to just get the drop-in filter - that's one thing but the entire "CAI" k&n 'kit' - don't waste your time. especially if you drive in dusty/off road places. just extra noise and poorer filtration. don't believe the hype.
as far as the exhaust, i'd wait for the stock one to rust out before moving up. typically a free-ier flowing exhaust adds power up high in the rpm band (where you don't use it day to day) and sometimes takes away down low. unless you're taking it to the drag strip, i'd forego the drone on the highway.
if you insist, magnaflow are good. get a shop to bend you the piping. make sure its mandrel bent not crush bent. it'll likely be cheaper than the pre-fabbed turnkey stuff and as good if not superior quality.