What duration? Cam manufacturer? What HP level/range?
If your looking to step up, depending on what arena your driving in, the choice of new rods is probably impossible to beat over reworking the old rods.
Hyper-U slugs are fine for street and strip performance. A forged slug is top dog and will take alot more abuse at the track for a longer period of time.
If your doing a "primary" street engine, then a set of inexpensive Eagle or Scat rod thatare good till 500 HP will do you well coupled with a set of Hyper-U slugs.
IMO, I doubt you'll need to spin the engine to 7grand to make max power. Highly doubt it.