I'm replacing my current set, right now I have Renthal twin ring and an R1 non oring chain. The sprokets seemed to wear pretty good but the R1 chain wore out pretty quick and is starting to chew up the sprockets. I did a search and saw a lot of you guys recommend the Regina ORN6 O-ring chain. I might consider getting that one but how does it compare to the X ring chain or the new ironman chain? Im think of throwing that on a set of twin rings again since they seem ok. Should I stick with those or show I get the Ironmans. Performace wise, are the Ironman titaniums good or are they too heavy? Also how do you clean that gunky shit off new chains, this last chain I didn't clean that grease off so that might have also contributed to the premature wear. I was thinking using varsol or pain thinner to clean it.