Not to get sidetracked, but....
I own a Beretta Cougar .40S&W and I love it. No malfunctions, easy to clean, nice recoil, and it just looks good. I looked real hard at the PX4 and was about to get one, until I attended a 4 day hangun course with my Cougar.
If you want a nice looking gun, that is accurate, buy a PX4. (I am assuming that the PX4 is a polymer version of the Cougar, so everything I like about the Cougar applies to the PX4.)
If you need a duty gun, or a carry gun, I learned on the range (thank goodness it was there and not on the street) that the Cougar was not for me other than range time. (and to maintain proficiency with a Beretta with the decocker configuration, I am a Navy Reservist and the Navy uses the M9)
A few reasons:
Decocker/safety - the levers not only get in the way, but on more than one occasion I either forgot to holster with safety off or I hit the lever on the way out. This meant pulling the trigger and no bang. I also chewed my middle and index fingers up on the levers while doing malfunction drills that require the slide to be actuated by hand.
DA/SA - even when I came out, pointed in, and fired, the first pull (DA) on the Cougar is long and hard. The next shot is SA, and easy as pie. I know there are different trigger options, but in the great state of Kommifornia, the DAO or 'Continous' options may not be approved. (I would no doubt have to special order anyhow.)
Ejection port - the ejection port on the Cougar and PX4 is to the right. Performing a chamber check forces you to tilt the gun to look in. Not necessarily a safety issue, just an annoyance.
Do I love shooting my Cougar, and can I shoot it well? Yes.
Can I trust that it will shoot everytime I pull the trigger? Not with the decocker/safety.
So I eventually settled on the S&W M&P in .40S&W, it has a similar feel and with the trigger system, large ejection port with chamber loaded indicator, accessory rail, adjustable rear sights I am all set. Remarkably, the M&P with a 4.25" barrel is about 1/8" longer than my Cougar with the 3.6" barrel. Both fit in my hands well. (I could not get used to the Glock grip, they were never an option for me)
Now if I can get over the magazine diisconnect safety on the M&P that my Beretta does not have.....
YMMV, the othe trigger options may be suitable for your use....
Bill in SD