Still bored at work, but I remembered this thread. Lots of good info. But it comes down to BC or Comp for valve springs depending on price.

http://forums2.freshalloy.com/showthread.php?t=115672&

"SPRING-----SPRING-----RATE @------RATE@---------COIL
TYPE ------HEIGHT-----1.339-------1.200---------BIND
-----------@ REST-----(34mm)------(30.48mm)-----HEIGHT

Stock------1.975------110 lbs------147 lbs------1.082
Greddy-----1.910------120 lbs------159 lbs------1.045
HKS--------1.902------113 lbs------147 lbs------1.099
Comp-------1.902------134 lbs------168 lbs------0.960
Ferrea-----1.892------148 lbs------189 lbs------0.960
BC --------1.953------140lbs-------175lbs------0.940