A simple one this. If you HAD to buy one which one would you get considering their prices are similar and you get the following advantages with each:
15" MBP
Faster processor
Larger and faster hard disk drive (compared to base MBA)
Larger screen and higher resolution
Matte option
Optical drive
Dedicated graphics card
Stereo speakers (Mono on MBA)
More ports
MacBook Air
Thinner
Better looking? (Personal preference may prevail)
Multitouch trackpad
Solid state drive option
15" MBP
Faster processor
Larger and faster hard disk drive (compared to base MBA)
Larger screen and higher resolution
Matte option
Optical drive
Dedicated graphics card
Stereo speakers (Mono on MBA)
More ports
MacBook Air
Thinner
Better looking? (Personal preference may prevail)
Multitouch trackpad
Solid state drive option