Morel Ovations are about as good as it gets for speakers. If you choose those you will need a lot of power. Morels are top-notch and on par with the very best such as Focal Utopias, and Dynaudio's. I have a set of the ovation 3-ways in my Armada and they sound incredible. I have a 4 channel Alpine PDX dedicated to them. 150WX2 to the Mid and Tweeter and 150WX2 to the 7" mid bass speakers. Its incredibly loud and Armada's are huge inside.
One person was convinced that I had 10" subs in my doors and was floored when I told him they were only 7" speakers. I have a single 12" sub and you cant even hear it over the fronts. It just fills in the bottom octaves.
BTW, Alpine PDX amps rock! I like that they are small but have huge power.
As far as subs I am amazed at the Dayton Reference Series subwoofers. I replaced my blown JL Audio 12W6v2 with the Dayton RS12-HO and it is better sounding sub and its 1/4 of the price of the JL sub and has twice the power handling! They come in sizes from 8" to 15" and can be bought from
www.partsexpress.com. These subs are an extreme value per buck!