Find a dealer that sells hertz audison, for that kinda money Id go with an LRX 5.1k for amplification or the JL 900/5 both are amazing amps that offer tons of power and keep the install simple.Alot of people say JL is overpriced in some respects I agree but they do make some great products. Steer clear of their component sets, Theres a ton better for 400.
Save some money and go with a 12w6v2 or an Image Dynamics IDQ12v3. A couple component sets in your price range Id look at are Morel Dotech Ovation 6, or Boston acoustic spz60's. If you have a little more money the hertz MLK 165 is an amazing sounding set.
If you want you could always drive to South Jersey and get a custom install for a way better price at my shop
I always tell people to set a realistic budget of what they are comfortable spending and basing the install around that number.