I am excited to go FI and I know responsiveness is the best gain. Mileage is not to big of a concern of mine, maybe just a little added bonus. I know carbs are tried and true but think the FI is superior after they sorted it out in 09. Still waiting on everything to arrive and doing research at the moment. Biggest thing on my mind right now is the external fuel pump/ filter/ FPR setup. If anyone has suggestions let me know but for now looking at the Cannondale FI pump and Walbro setup as others listed. My SE is my favorite bike I have ever owned and I want to make it the best it can be. It has many many great modifications and this is the next step in it's evolution.