[headshrink]

More torque, yes. But IMO you would move through the first couple gears so fast that you may not feel like it. Shift, shift, shift slows you down a bit too. 15T is my preference because it smooths everything out and puts the shifting points where I intuitively feel they "should" be. It's personal opinion though, and for about $25 you can try a new counter-sprocket and not be out a lot of money if you don't like it.

I read on another board that 1T on the counter-sprocket is aprox. equal to 3T on the rear (not sure, just repeating). Assuming this is true, you could theoretically "fine tune" your gearing by making adjustments in the back too.