I have Papa Sierra trigger and internals and a threaded muzzle. That's about it. I love mine, it's so no-nonsense and boringly reliable. The sights aren't great but you can ring steel with them all day long. I have a dot I mount sometimes but the irons are more fun. I shoot mine about every time I go shooting, especially at the local indoor range where big boy rifles aren't allowed.
Honestly, the Scorpion has a lot going for it that the CX4 doesn't (pistol grip, flat top rail, better sights, Threaded muzzle from the factory, etc.), but the Beretta has it beat in one category- magazines. If you buy an EVO, you've got either plastic mags or plastic mags to choose from, and while they're cheap, I've seen a couple people online report they give up the ghost if you use them heavily.
Metal B92 mags are just about bomb proof, and I look forward to the Army dumping all their old ones when the Sig contract really takes off.
Is yours 92 or PX4 mags? If it's 92 and I could tempt you with a trade, I'd almost be interested in a second one to do something ridiculous with.
Over on the Canadian forum. I think he's still trying to sell that one. Shame he butchered it.