I bought my Beretta because I'd always wanted one, and I feel comfortable shooting it. I bought my Glock 19 because my wife showed an interest in it initially, and it was a way to get her involved shooting a bit, and to get into the Glock thing. I'm happy with both because they have sleightly different purposes in my collection, I'm leaning towards the Beretta as my carry weapon for when I get around to getting my permit. The Glock however may also fit the bill, I just have to get a bit more experience shooting/carrying both.
My advice would be to consider if you can live without one, then get (or keep) the one that will give you the most use. While expensive, the Beretta is one of few pistols I would bet my life on because of its reliability.