Alright, I know that this is one of the most discussed questions on the forum but I still don't really get it. I'm definitely not the most technical guy either. I finally decided that I wanna convert my stock navi into a dvd. I'm really lost in the differences between all the units, plug and plays, pac-, etc. I need help from someone who's got it done on there 05 coupe. I need a device cost, install cost, and if its reversible. I also need to know a great place to get it installed in LA or OC. I got my sound system install at a place near Dana Point area, but I think they may overcharge. So for all you LA or OC people, please respond, I NEED YOUR HELP. THANKS EVERYONE