i have a gsr block which im boosting. looking at new pistons. had eye on supertech pistons but could only find 10.0:1 for my gsr for 405 with rings. I seen wiesco have a 8.6-8.9:1 piston for about 480 with rings and shipping. cp have a 9.0:1 pitson with rings for about 580. which of the two are better or if the supertech is best overall. Ill be running about 20psi. Dont know what is the best piston. if it comes down to 100 bucks ill spend the money just need an educated opinion