From what heard Performanceunlimited is a big talker and raises the price due to their suposed bullet proof design. I think they are the same rod ends and DOM tube anyhow.
Performance Unlim. can supply thicker wall tube and stronger heims if need be but the price increases big time. You might be better off buying the rod ends on line from Aurora and buy the DOM tube yourself and have a machine shop tap all 4 ends for $40 or so. Seems cheaper.