Search online for a brand called Niche Audio if you're on a budget... It's GREAT stuff, but not at a high ticket price...
If you go with the Niche line...I highly recommend the Titanium series if its affordable, but the low level, Evolution series is also superb for the money
Their amps are some of the best I've ever used for their price range, real quality stuff at a low cost.
Also, their sister company, Majestic, makes great component kits. I ran them in my car for a year and only went back to coaxial speakers because I wanted to change. Their speakers are good too...
Also, it would appear that your car has 6 speakers from the factory...you'll need to take that into consideration...
Here's what I'de recommend as for speakers, subs, and amps from Niche and Majestic, should you decide to go that route:
Speakers:
3 sets of the Majestic 6.5" coaxial speakers(or 2 sets coax / 1 set component)
Subs and Amps:
2 10" Niche Titanium series subwoofers
1 Niche Evolution series NA1010E or SQL series 120.2C Amplifier
OR
2 10" Niche Evolution series subwoofers
1 Niche Evolution series NA1010E amplifier
I recommend niche and majestic because i helped design the product, so I know what its capable of...i've pushed over 500W RMS to the titanium 12's for 2yrs, and they're rated at 300RMS/600Peak, and they never once had a problem with overheating, clipping, or damage of any kind...its all about having a clean signal and a proper amplifier to push them