Go coil overs or stay with stock style with springs

[PureVenom]

Ok, I'm trying to setup a plan for the car for this year. Suspension is #1 on the list due to the knocks and bangs I have going on in the rear right now.

Obviously, there are 2 options: Go coil over, or stay with my same setup and just get some actual springs and change out from my cut stockers.

Which would be a better idea for a car that is more interested in cruising and doing some real spirited cornering? Common sense tells me coil overs, but I'm not a suspension expert.

If coil overs, what kind of spring rate would you suggest?

[DarkShadows]

coilovers for the win. you can not go wrong with fully adjustable ride height. friend of my campain's a 96 cobra with Koni sport adj shocks and Custom Ground-Control coils, and adjusters. also uses a camber kit (dont know the name.) So all and all i would go the same route myself if I had the money right now.

*EDIT*

nevermind he doesnt had ground controls, he has h&r race springs. but there are companies that make to coilover for the car though im just not sure where to find them