So, 130k miles later i'm finally looking around to replace the speakers in my car. Some have started to crackle, the rear deck speakers/sub now rattles pretty bad. So i've been looking around, and attempted to gather some info and found that the front door/rear deck speakers are 6x9 and the dash/rear door speakers are 3.5. In my searching i came across this direct fit speaker system that includes two 6x9's and 3.5's, which makes me think i could just order two sets and replace everything (except for the sub). Does anyone have any experience with these speakers or the setup? Is this truly plug in and play? The model # for the system im looking at is KFC-XP6903C. Thanks for any info.