For a 200 you will need the CTSRN007 with an alpine patch lead. As far as speakers the standard fit sizes are 5.25" (13cm) all round (components up front & co-axials in the rear. If your running off the headunit, look for speakers with a high sensitivity figure in their specs. Try focal / hertz / dls. Try and get to shops and have a listen as they all have their own sound. I like dls as they use silk tweeters and sound less harsh than other brands. To really get the best though, an amp makes things much better, and you could afford to lose the rears altogether. Sound deadening will always help by stopping panel vibration and giving you extra volume. The biggest gains IMO are by mounting the mids securely in the door. I'm currently trying to mod the inside of the door panels and mount 6.5" components to mdf baffles attached to the door. I don't like the way the standard speakers attach to the plastic door card.