Got the 77mm forged pistons for my rebuild. Really good quality and the soo light i couldn't believe it. Come with a special coating around the sides of the piston to help bed them in. Really smooth and highly polished. When the were in the block they looked soo good and i didn't want to use it. Defiantly worth the money and you keep the same compression ratio.
http://www.wossneronline.com/
i also bought some of these a while back and thought the same but later found out i had melted one when my engine over heated due to cooling problems without booting it at all,