93W91SER I heard about prothanes and all. I currently have the ES on my car and they still work good since the 1st day I put them in about 2 years ago. My friend likes how they perform so I will have to get him what he wants.
I've had both. Just recently took out the ES inserts whice I've had for over 2 years, and put in some Prothanes. The prothanes vibrate more, but its a more solid ride. I'd go with the Prothanes over ES, but both are good.
JGsnismoser, got all 4 ES inserts in stock, in black. No Prothanes in at the moment, probably wont have em for at least a week.