Tangman99, The GSXR 600 is a little outdated. Honda and Kawasaki both have brand new 600's this year and then there is the R6. The GSXR is still a great bike but not as trick as the others. My dealer told me the 750cc class won't be made much longer because everyone rides 600's or 1000's. I don't know if this is true or not but it is something to keep in mind. The GSXR 750 is a fast little thing as well.
serpentine5 not sure on the top speed (yet) but I think it is around 150 maybe a little more.