I have a new '04 Toyota 4Runner with the upgraded JBL sound system. It is a 10 speaker system that has a factory amp, sub, and center speaker. I am not at all impressed with the sound and am trying to decide how to upgrade. I considered a new HU, but that seems like it will be the most work intensive because I will basically have to tear out the whole system and start from scratch. So at this point I am thinking about new speakers. There are 6x9 in the front doors, but I want to switch to 6.5" components. I have had Infinity's in the past and found them to be very tiring on the ears because they were so harsh. I am looking for something with good SQ, but something natural sounding. I like to listen to my music loud on some occasions so it would nice if they also don't distort too much. Thanks in advance for suggestions. I would be willing to spend $350 or maybe a little more, but of course if there is something out there that is very good but cheaper that would be wonderful!