An Icon IC745, same piston that hughes list, is 517 grams without pin.
Pin is 118 grams
Total 635.
http://kb-silvolite.com/test/icon/icon.php?action=details&P_id=325
The diamonds are without pin weights, I've spoken with them and asked that specific question, add about 115-125 to it for the total
http://www.diamondracing.net/MoParSection.pdf
I'm not surprised hughes doesn't have an apples to apples comparison on there site. be nice if they actually listed the item with the piston/pin and a total.