Are Lighter 440 Pistons Worth the $$$ for the Street?

You should have it balanced regardless of what the pistons weigh, unless there's no change from the previous build, which isn't going to be the case.

The Icon is a better piston, there's other differences over the older pistons you might like, such as tighter clearances, and they use a smaller ring package too, which is superior.

As for what it's worth...ain't my money. S/F....Ken M