Generally people can run a 14.8 or so with an i/h/e GSR that puts 155 hp to the wheel. With those cams and such, the car you're looking at will be putting out similar power. The gear ratios in the non-GSR transmission are longer which slows acceleration a bit.
I wouldn't pay 6 grand for the car, and for some reason I have this idea that the body kit in question is freakin huge.