This thread has been amusing.

I think playing with the positioning of your tweeters will help with a lot of the harshness that you are experiencing, having played with these drivers before, they are good value for money, but they arent great. The tweeters especially are one of the weak points in this component set.

I have found in a few cars, that firing them across the windscreen, pointed straight at each other helps with some of the 'harshness' that they have up high.

These speakers are as good as you are going to get, on a budget. You will probably find that EQ wont help, as it fixes some things, but adds in problems, or issues of its own. You may end up just having to move them to your rear fill, and upgrade to something better, speakers and ears are funny things, if you do pick something else, take the time to listen to different speakers with the kind of music you would listen to with them, and pick the best from there.