On the same page with everyone else, it is incredibly important that you go in with an open mind and not attempt to pick out certain sororities. I am now a sophomore at UF and when I rushed as a freshman I did the same thing - trying to pin point certain sororities. I was a even a legacy at a house you mentioned, but once I began going through rush I found that some of the houses that I had been told were the "coolest", completely turned me off and became the longest 20 minutes of a conversation in my life. So just remember, there are 15 sororities at UF. That's a huge number! And you never know where you'll meet your best friend.
On another note, I will be a Rho Chi(Recruitment Counselor) this fall for rush and cannot wait to meet all of you guys coming through recruiment. For me it will truly bring back some memories being under the tent again! It'll be an awesome week, so get excited!!!