isn't the stock rods also forged...i never really understood why to upgrade the rods unless your going for a super build...i've seen people run 600rwhp on stock longblock safely...if anything pistons would be the first thing i'd consider upgrading and keeping the rods stock with some arp hardware...but thats just me...
in any case though back to topic at hand...spend the money elsewhere if your crower rods are still good just keep them in there and put your money towards some bigger turbos or intercoolers or something else that you may not have.