What may make you happier, is to simply remove the factory rears, and use a powered subwoofer like an infinity basslink. Based on your previous statements, I think this will give you a good mixture of bass, low cost, and space savings.
That doesn't sound like you even read my previous statements ! Again.....i do not want to, and will not under any conditions do anything to my stock accord system but replace the rear 6x9's. I can't make that any more clear. I'm happy with the way it is except for the rear bass getting distorted as it gets louder. And since the rears really only contribute to the low end, subs seemed to be the best idea.
I'm NOT looking for that kicking sub sound that you all lust after. I just want the bass to be tighter in the rear w/o losing the amount of low end i have now. Many of the ones i've listened to so far are either lacking in lows, or the highs are blaring, and i don't want the high end to compete with the fronts and ruin that. But the ones that have little high end had lousy bass. There seemed to be no in-between w/o going to the $200 plus speakers. So i thought a pair of subs would ge good since they would be less likly to distort because they are made to handle lows. And even tho they wouldn't be enclosed, the rear gets a lot less power than the front, so i think they'd perform fine, especially since the problem with using subs free air is only a problem if you're trying for that super tight cranked bass tone thats so popular today, which i'm not. To my ear thats not even a realistic sound. It's bass taken to an un-natural extreme IMO.