I too would reccomend 6 1/2' components in the front. Most of the time depending on what brand you go with, they will sound better. As far as the rear You can stick to 6x8's to save money, you'll mostly be hearing the fronts anyway. Look around and you can find some pretty good deals on some 6 1/2 components. give us an idea of your budget and I'm sure we'll come up with some ideas. You shouldn't rule out a good 6 1/2 coaxial either, they also can sound nice and you don't have to worry about mounting the tweeter.