I bought the same bike in the same color with 7k miles. It was dropped and wouldn't start after the previous owner fried the computer when trying to jump start it. Paid $2500 and another $125 for a computer on ebay, spark plugs, oil and new coolant, new fuel pump and it starts up perfectly.
If you want a sports bike Thats Aggressive but not as aggressive as a gsxr600 / 750 then a Suzuki gsx600f / 750 is also a perfect bike they are comfortable fun bikes with the right pipe and sprocket setup you'll be able to give the gsxr600 zx6 r6 a good run my brother has a Suzuki gsxr750 my son has a Honda cbr600rr and i have a Suzuki gsx600f all fun bikes im also a fan of the older sports bikes they sound amazing with the right 4 in 1 header and exhaust