Instead of trying to remember the benifits of freezing metal parts, I am going to give you a page.
This would be a good route to go if you were looking for an improvement, but didn't have the cash for a complete system.
Diversified Cryogenics The people I have talked to there are quite helpful. Non-slotted/non-drilled SVT front rotors were about $98/ea for Raybestos PG parts.
And...Stock rotors, heated to the point where they actually glow, makes those nice stress cracks pretty quickly.
Yes, I let them cool, thats why they are only now minimally warped.
