As anyone who knows me can attest, I love my Bersa. It is 100% reliable (man, a $215 gun and it is my most reliable auto because this one hasn't had even one bobble), it feels good in the hand, points well, seems well made, and it is very accurate. However, I'm not sure you should trade the P-32 for a Bersa. They simply don't fit the same niche.
The P-32 is a true pocket gun. It is tiny and very light. You can put it in your pocket and almost forget about it no matter what you are wearing. That means it makes a good backup to carry with another gun.
The Bersa is "pocketable" but not really a pocket gun. In size and weight it is comparable to a steel framed J-frame. That means you certainly can put it in your pocket, but in size and weight both it is pretty much at the limit for what can be pocketed. Thus, it doesn't really make a good pocket backup. For most body types and clothing styles, if you put it in your pocket it is heavy enough that it is going to be more a primary that is simply more deeply concealed, you probably won't want to carry it in pocket along with a belt gun or IWB gun.
As I said above, the P-32, with its small size and light weight, is more of a true pocket gun. Thus, if you aren't confident with it and want to replace it, then you should replace it with another pocket gun. There are good ones out there- Beretta Jetfire in .25acp, Beretta Tomcat in .32acp, NAA Guardian in .32 or .380, heck even the polymer 9mm Kahr PM9 is much lighter and noticably smaller and makes a better backup piece than the Bersa.
I love my Bersa. I may even pick up another someday. It is a great gun, and if it meets your needs (i.e. you don't carry in your pocket as a backup, you want a small primary that can completely disappear in pocket, on the belt or IWB) then get it. However, it doesn't really do the same things the P-32 does, so if you use the P-32 as a pocket gun you may want to go with something more comparable.
(just joking