I'm prepared to spend $2000+ on a good set of Tein, Cusco, Kei Office, HKS etc etc coilovers because I KNOW they've done their research. I know theyve got the experience to backup their product. I know theyre top quality because they can't affort to make a crap product and lose reputation.
G4, never heard of them, don't know their background, don't know if they even try these things out on the real world, hell I'm not even sure they understand how a good suspension setup should be.
I bought a set of second hand Cuscos for $1000 ex-japan. Took a little bit of a risk but even if they were blow I could have them rebuilt for under $600 and have a virtually brand new set of coilovers for $1600. I wouldnt hesitate to do it again should I want another set in the future.
Now from the admin/mod: Removed commercial links. Not gonna help sell things, if people want them they can hunt them down themselves. Hope you understand.