Well, here's a 2nd opinion..
I had never heard of Arcus (my bad) so after my initial post I "googled" em, and what I found was surprising.
Apparently the Arcus is basically another Browning High Power Clone, and I mean that as a good thing.. I think the original BHP's were super pistols.
www.gunblast.com did a test on a Arcus on 9/20/06 and thought a lot of it. You might want to read the article.
www.worldguns.com also thinks very highly of them.
So, my new advice would be that you probably will be well served with EITHER the Bersa or the Arcus. If there is any advantage to my mind it would the the lifetime warranty offered by Bersa, but for all I know Arcus has a good warranty too..
I read where the Bulgarian Army uses the Arcus, so it must be adequately reliable for harsh military use.
Another option if you are looking into BHP Clones would be the FN's... I understand they are basically identical to the original BHP's but I'm not sure of that.
Looks like either choice would be nice...
Hey, another thought.. Ever considered CZ's? I really have read good things about the CZ75's and the new CZ01's (I think that's the model).
Too many choices!
Best Wishes,
J. Pomeroy