both, fierenze and rome are just great. wonderful, they have to be visited.
you now start to impress me Ganja. this is good what you are doing now. the only problem at fierenze is to land there with a plane. maybe you can not because of the wind - then you will land at pisa. but this town also is a part you should see while you are on this planet.
but
rome. this is the most beautiful city I did ever seen. its a open air museum. and nice people and good looking girls all over. its the Italian part as it. enjoy, enjoy and enjoy!!
you can and should go there by feet, but also with bikes its ok. they do not drive crazy - yes they do - but not with high speed. a lot of traffic all around, so no need to be scared with a bike.
and say hello to the pope - its a friend of mine.
but if you go by car, you can make a stop everywhere. its just a perfect part of Europe - this Italian one

have fun!