Digital Destigns, DC Audio, AudioQue,T3 Audio, also Image Dynamics, and a good amp to power whatever you choose... i like kicker or sundown amps personally... google or
ebay search, or search for some of that gear in the classifieds. you will also need a good h/u, i'd say alpine 9887 or pioneer premier prs880 would be the way to go (you can go active with those). as far as the rest, get a good front stage with an amp, wattage is gonna depend on the speakers, but id say look for some rainbow or focal comps, but if your on a budget, get the pheonix gold rsd65 comps, people are loving those. make sure to deaden your doors with some raamat, dynamat, edead, etc...
i would do alot of searchin and reading here, as opinions vary alot. use the search button, or just read around and eventually you'll get an idea of what you want to do...
and remember, the search button is your friend...