Unfortunately, I've seen too many people kind of ruin their first big trip by bringing a lens that was way too heavy or just not as sharp as they hoped. I had issues with a cheap all-in-one zoom a few years back and the photos were honestly not as good as expected... blurry and just lacked that pop. For Italy, you definitely want a zoom thing so you can frame those narrow streets easily without having to run around constantly. One major warning though: avoid those massive professional lenses that weigh a ton. They might look cool but they will kill your neck by noon if you're walking five miles a day. Stick to a versatile, mid-range zoom that stays light. You're gonna have an amazing time, just keep snapping pictures of everything!