I can speak to this since I just installed the same set. The adapter plate provided fits 95%, there's one hole in the adapter you have to extend a little - super easy if you have a dremel. You can use existing wiring if you're not pushing extra power to them. I'm running 90W RMS to each of mine so I upgraded the wiring; stock is very very thin.
I can tell you these speakers sound absolutely awesome with 90 watts, they were not too impressive with stock power though. If you're looking for an amp without the need to run a separate power wire through your car, check out the one I have -
Alpine Power Pack KTP-445u This fits neatly behind the headunit and only took me an additional 15 minutes or so to install.