I would suggest getting an adapter plate to fit a nice set of 6.5" components instead of trying to find a decent set of 6x9's. As far a budget components go you can't beat Pioneer's PRS line, but they, like any good set of components wouldn't really sound that great until you give them their own amp. You might also want to look into a nice set of CDT components, but don't go for their budget sets, they just aren't worth it.
For an amp I would suggest Sundown Audio, Kicker makes some great amps, and I really like their mono amps, they are power houses, but Sundown has better options as far as crossover's go, their build quality is over the top, and the customer service is damn near godly.
http://www.sundownaudio.com/1004.html
If you go to any of the top car audio forums and ask a question with sundown in the title you can bet that Jacob, the owner of sundown will be there to personally answer your questions.
You might try caraudio.com first, but beware that their are quite a few trolls on that forum.