I've got some i530 and King Tec in the bag. To me, Ping looks better and has a slightly smaller sole. King Tec has a better feel and is very forgiving. Both go a good distance. At the moment i have 2 5 irons in the bag as i continue testing, will go again tomorrow and see what happens. I also have the 530 4 iron in power spec and when stuck centre it's an absolute rocket.