Keep in mind, if you go with a wider profile tire on the 14" rims, then the tire will be shorter in height, which might cause the car to sit funny.
In going cheap, I have 14X6" Rallys on the front of my car with 70 series 225 tires. I wanted a bigger look in the back, so I put 15X7" Rallys back there. The tires are 60 series, 255 tires. It turns out they are the same height as the front tires, but with a bigger rim, and being a wider tire...It gives an illusion that I have something bigger back there.
Mike