The PX-4 Storm would be my choice due to modular construction that allows you to interchange back straps to perfectly fit your hand and shooting style, while the slide lock and safety are ambidextrous; in addition, the magazine release is reversible, meaning that you can easily train with and use your PX4 with either hand. The spare /replacement parts are more readily available and spare magazines less expensive. Both are great so this will be a hard choice but, either will do the job.

of the two I like the cz but I suggest that you see if any ranges near you have them as rentals so you could try them and see which you like best

I'm a big CZ fan, bought my first 75 in 1995, and have a couple Custom shop models and a 75 SA left. That said my favorite truck/car pistol was my PX4 compact. I never tried a P-07, looked at them in the past, but had I not found a Beretta 92 compact, I'd still have a PX4. My only issues were the grips being a tad slick, I put Talon Grip tape on it, and the safety levers digging into my hand when racking the slide, but got used to it pretty quickly.

Look at one of these Beretta apx ones too. Nice rebate with it. http://promo.beretta.com/2017-apx-promo?_ga=2.222002520.1175613695.1512527427-347810614.1508135283

I said the px4 earlier too

Great choices. Both are accurate and about the same size. I'd give the CZ the edge since I like their triggers.