I've been lurking in this thread before my trip to Florence and here are my thoughts:
First night was dinner at Il Profeta which is around the corner from the Westin and St. Regis. Claudio was our waiter (and I think a co-owner of the restaurant). He took a huge amount of time to explain all the menu items that I felt guilty monopolizing his time. We had a salad and a pasta with prawns. My wife had a pasta with some sort of lemon sauce. For dessert we had a great tiramisu with zabilgione cream on top. Bottle of wine came to a total 142 Euros. Second night we went to Osteria dell Enoteca. The meal was sensational. I had the penne with a rabbit ragout. My wife had the "cubed pork" entree. There is no wine list. The waiter took us to the wine fridge and asked what we were loking for. We said something like a Chianti and he picked out a bottle for 22 Euros which was excellent. Total bill was 71 Euros. Our last night we went to Da Fagioli. We had bruschetta, a panzerella salad and penne with a beef ragout for me and my wife had a spaghetti with pesto sauce. We ordered the house wine where they give you a bottle and just charge you for how much you drink. Menu is all in Italian as someone said upthread but the waiter spoke enough English to get us through it. The bill was 56 Euros not including tip. This restaurant is cash only. This seemed to be the most authentic dinner of the three nights but my wife really liked the nouvelle cuisine at the Osteria dell Enotecca. For dessert we went to La Gelateria across the Arno on night 2 and it was good but last night we went to Gelateria la Carraia which I will now vote as the best gelato in Florence. It was amazing. Please forgive the spelling errors and typos. It is late in Florence!!!!