Hyper vs Forged

http://www.summitracing.com/search/.../Forged-aluminum/Stroke/4-000-in/?Ns=Rank|Asc
Here you go. Just finish putting the info you need for you motor. I like Ross Racing Pistons, These things are super light and made out of high quality stuff.
These are the pistions I used in my 340 http://www.summitracing.com/parts/ROS-99625/