Smallblock Pistons: 1 question.....KB's -or- Sealed Power(SpeedPro hypers)???

I dont have an answer on which ones are better. It really depends on what your built Intel's. But I will say this Kbs are lighter and usually have a higher compression height. But the speed pros (so I have read) are stronger. And they are closer in weight to factory pistons in most instances. What are you building? 318 340 or 360?
Were building a street/strip 340 so i can introduce my kids into Dragracing.ive been into it for some time and i usually put forged pistons in my engines but im not looking for them to hop in a 11sec street machine, ya know? Just a healthy .500+/- cammed 340 with the obvious goodies, auto and maybe 4.10 or 4.30 gears. Thanks