I currently ride a 2011 CBR250R. Its a fun light bike that gets me 60-65mph without any even trying. Now for my 2nd bike would like to add a screamer to go as fast as $#@!. Want to hear what tennis players have to say. A 3rd choice might be a GSXR750. Just not in the lead as for city riding a smaller motor is sometimes more fun as you can rev it out more. And most of my riding is in city limits. This is for the 2012 models. So which would you chose for pure fun GSXR or CBR.