The S4RS does not like to be in traffic. Very jumpy throttle and gets hot. You are also right about the difference between the maintenance costs between the air and water cooled bikes because of the complexity of the 4V motors. So if you do not work on your bike and have to pay for everything forget the S4RS and the 800cc S2r and keep looking for that 1K S2R. The 800cc S2R has lots of cheap substandard parts than the 1K one. Main difference being the suspension. Not adjustable at all. Second being the brakes. 300mm front rotors vs 320mm rotors on the 1K and I believe different calipers up front also. Good luck.