I've been trying to get Progress coilovers for my 5th gen for probably about a year. I keep getting emails that they are a future product. If you want a good setup based on Koni yellows call OPM Motorsports in Ga I believe.
www.opmmotorsports.com They produce a suspension setup that is application specific, custom valving shortened struts etc. If I were not trying to sell my car I'd have their setup on it. I currently run stock koni with gc 450/400