just thinking of ideas to suggest is making me hungry! LOL
Ciao Gemma,
Don't worry about splashing your dress - think about what you'd like! Do you have a caterer helping you out? I am sure they have some menu proposals with what is often requested and popular. Are you organizing a sit down formal reception feast or more casual, with buffet style serving?
While I love pici all'aglio (homemade spaghetti with red garlic sauce) I'd also stay away from it on a wedding day, for the same reason you're concerned

But since it isn't usually served at weddings, I am thinking it is already something caterers have considered.
I'd think a risotto with a seasonal vegetable would be very good.... wedding is in September or October, right? So maybe with pumpkin/squash? or mushrooms/funghi porcini?
Then a pasta dish, usually some ravioli with a cheese sauce, not too liquidy so it doesn't splash. In Tuscany potato stuffed ravioli are a local specialty, as well as those stuffed with ricotta.
For main dish, in Tuscany you end up with meat.... something like bistecca Fiorentina might be too pricey, but you can definitely go for the "tagliata", with roasted potatoes and grilled veggies as sides. Another popular option is "cinghiale" which is wild boar. You'll also have to consider some vegetarian options for your guests.
Ok won't offer ideas for desserts because that is way too long

choose what you like.... just consider that many offer the possibility of doing crepes with nutella on the spot for guests who would like that "extra" option in addition to the wedding cake LOL ;-) Have you found a bakery for the cake already?