I would try the rear sway bar only first; for most this will be a huge enough cornering improvement. I wouldn't add the front sway bar on stock tires. At that poit the capabilities of your suspension will out perform the grip of your tires; not even worth it. If you get a wider wheel and tire or wider tire/stickier compound then you can utilize the improve cornering better. In fact simply changing the wheel and tire can result in a very tangible handling increase. The rear sway bar is the most tangible increase, the front sway bar is tangible, however replacing the stock FSB with an aftermarket FSB is not as significant a change as swapping the RSB. I probably wouldn't touch the FSB on a CX-5 with stock ride height. It might introduce some undesirable over steer with the soft suspension and it's travel. On our car, the strut tower bar isn't very tangible but it's good for reducing flex between the towers during cornering. Which means for a "sporty/hard" driver less metal fatigue over time and less alignment change during hard cornering. The AWD itself helps a lot maintaining grip, maximizing the cornering performance of these mods compared to the same mods on a wrong wheel drive cx-5. I don't know if you just got your cx-5 or are just new here, but the best way to get the rear engaged when you want (or need) it is to downshift. Particularly in high speed sharp corners where you can tell the difference between going through in 5th or 6th, and 3rd or 4th.