Luca is a really great place to go for special occasions, with knowledgeable waitstaff and a great menu.
Make reservations if you plan on going -- I saw a few couples wait quite a while for a table. This isn't somewhere you want to go last minute!
I had the cavitelli and it was a huge portion, making the more expensive prices on this menu a little bit better. It tasted amazing. I'd also highly recommend their calamari, which was done in a tomato sauce and not fried like you'd typically think of. The calamari was so tender and delicious, and that's saying a lot for someone who usually doesn't like fish unless it's fried!
I went here for my birthday and I thought they did a nice job with special occasions -- they let me pick any dessert off their menu for free, and they even took a picture of me and put it in a little cute paper frame. Nice touches! I ordered the cheesecake with fresh fruit and a fig sauce and it was absolutely delicious.
This place is pricey and probably not somewhere I'd go frequently. However, it outranks Chinato on Italian food and it's the same price level. It's perfect for celebrations and special occasions, and it's in a great location overlooking the flats.