Re: Peterson\'s new long travel leaf article, read this?
To captialize on what zcar said, a thicker spring pack doesn't always equal higher spring rate. Take a close look at the leaves, Deaver uses a leaf that is approximately 50% the thickness of the thinnest leaf avalaible from the mass producing spring companies. Deaver has built their reputation from building springs for desert racers, they filled a void that National Spring created by offering a great product with great service. In the last year or so, they have branched off and done some springs for rockcrawlers and the results have been excellent. I've heard said that a National spring pack will go maybe a season before they start to sag, whereas there's racers that have been running a Deaver set for for race seasons with no problems.
As for price, they are expensive, cause they don't mass produce packs, except for a couple of niche markets (Rangers and zcar, correct me if I'm wrong, Toyotas) and these packs still carry a hefty price tag, but from everything I've seen and heard, well worth the price.