I really like the idea of the stroker moving the power band lower in the rpm range making it more street able. Makes sense to me anyway, maybe others have different opionions on it.
Why do you want more power? Is the car slow as it is right now? I bet you might even be pleasantly surprised with a rear gear change. Figure out what your car has in it. Then worry about power.
I'll also ask this. Have you ever been in a 12 second street car? Have you driven one? If you haven't, hangout with some of the local car guys, see if anyone will give you a ride in their's. Everyone loves to think 12 seconds is slow. But to put it in perspective, a low 12's car, hits highway speed from standing still in 4 seconds or less.