Following on from my other thread, I've decided to ditch the faulty and antiquated navigation head unit and DVD drive in my Accord. I will instead be installing a double DIN head unit with all the features I need. I would like to keep the factory amp, speakers and sub (for now). Has anyone here done this before? If so, any advice or tips? And I assume I'll need to buy and fit some crossovers so I can use the dash mounted tweeters? Thanks.