I wanted to know if your FE was down after the 205/60/15, because there is a diff' of 1.2% slower with the stock tyre (165/80/14, VXI)
I guess the best option would be 195/60/15, it will come around 0.7% which is quiet nominal. Even I am planning for the same, As I was not able to find good set of Alloys. PlLanning in a month or so.