Crutchfield.com will tell you what speakers physically fit into your car...
After that, go buy them from NewEgg or Amazon...
Also, I hope you know how to solder and/or crimp cables.. If not, you better learn fast.. I installed my own car radio at the beginning of this year and didn't have any problems.. Bought everything from crutchfield.. Unless you need a universal mounting kit, a special wire harness and an antenna adapter plug just to install a standard radio, then you'll get better deals than Crutchfield at any site on the web.. It's only when Crutchfield bundles in all the installation hardware you need for free, and you need a ton of it, does it become worth buying from Crutchfield.
Onboard RAID vs. 3Ware RAIDI never recommend people run RAID-5 with onboard chipsets.