$1000 won't buy you much as far as quality coilovers go. But I think the first thing I'd want to know before making a recommendation is what you use the car for.
If you don't track it, and aren't going to pay to have it corner balanced, your money would be better spent on a set of nice springs a a quality damper.
That being said, I am interested to get my hands on a miata wiith buddy clubs on it. They are relatively cheap, and an S2000 I tuned recently with a set of them suprised me. They had more flexible damper adjustment that I thought they would have.
If I were you, I'd ask for people who reply to state if they actually have experience with the coilover they are recommending. Many of these types of threads turn into popularity contests based on nothing but rumor and not personal experience.