After listening to all of the Focal lines, I wouldnt buy any of them below the K2s. They just did not have a good a value to performance ratio IMO (same thing with Hertz, wouldnt buy anything below the Mille) ; and some people will simply never like Focal speakers as they are pretty "bright" to alot of people.
My usual bang-for-the-buck recommendation is Boston Acoustics.
But, I must say, with a budget like yours and you seem to be willing to listen and learn, I'd consider going active with raw drivers from
partsexpress.com or madisound.com or companies that sell separates like CDT, etc.
You can pick up some nice drivers that fit your needs and within your budget and its pretty much guaranteed better value than virtually any component set you can buy from a car audio company.
Also, you'll definitely want some good deadening if you're not running subs but want low end extension.