I am not a huge fan of the Burris FastFires, Vortex, etc, micro red dots for precision shooting. I believe a tube is superior.
However, mounting a traditional tube (Ultradot 25) on a Model 52 requires drilling the frame for a mount. Ouch! And then, of course, you're stuck with your sights attached to the frame, which is widely regarded as inferior to slide-mounted sights.
A good mini-tube would work well, and mount (relatively) easily to the 52. There are various models, including the popular Trijicon MRO. Check out Bullseye-L forum for more discussion on optics.
That said, the Trijicon MRO, and other high-end mini-tubes, are somewhat pricey even here--$400 or so for the MRO. I have no idea what the exchange rates and importation would do to the price in Italia.
A third option would be to acquire one of several popular European-made bullseye and International Rapid Fire pistols, most of which have provisions made for mounting modern optics.