I kinda agree, but realize that the urge to improve a bike is strong as well. I'm convinced that the best bang for the buck in your case is lighter wheels and tires. The down side; however is that your ride may be less comfortable. Do you encounter many hills? Since you ride a 3 speed, I'm guessing that you avoid the steep, long ones. Weight is and important factor when climbing hills, but I've not found it to be all that significant overall. On my commute to and from work, I've not seen any real time or average speed differences between riding my unloaded light bike (~22 lbs) or my regular commuting bike (~33 lbs + perhaps 5lbs of cargo).

Nice Bike BTW.