shit I hate Best Buy with a Passion because they are over priced as ****...and I am also not a very big Kenwood fan...but I got 2 3-way Kenwood 6x9's and 2 Kenwood 6.5's for 220 at Best Buy including instillation...and the highs are incredibly crisp and clear....
Get a nice set of components up front, get rid of the tweets on the dash and the rear fill.
Or, if you want the rear fill, just leave them stock and power them from the head unit.
Are you willing to modify your door panel? Youre going to have to, to get most 6.5"s in the door. Not much space to work with at all. I just cut the factory grill out and put vinyl on the door panels in my 97 bravada.